diff --git a/lottery.html b/lottery.html
index 324c298..648cf15 100644
--- a/lottery.html
+++ b/lottery.html
@@ -1,135 +1,200 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>抽奖页面</title>
-    <style>
-        body {
-            font-family: 'Arial', sans-serif;
-            height: 100vh;
-            margin: 0;
-            display: flex;
-            justify-content: center;
-            align-items: center;
-            background: linear-gradient(135deg, #6e45e2, #88d3ce);
-            color: white;
-            transition: background-color 0.5s ease;
-        }
-        .container {
-            text-align: center;
-            background-color: rgba(255, 255, 255, 0.1);
-            padding: 30px;
-            border-radius: 15px;
-            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
-            opacity: 1;
-            transition: opacity 0.5s ease;
-        }
-        #pointsDisplay {
-            font-size: 1.5em;
-            margin-bottom: 20px;
-        }
-        button {
-            padding: 12px 30px;
-            font-size: 1.1em;
-            border: none;
-            border-radius: 50px;
-            background-color: #ff5722;
-            color: white;
-            cursor: pointer;
-            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
-            transition: background-color 0.3s ease, box-shadow 0.3s ease;
-            margin: 10px;
-        }
-        button:hover {
-            background-color: #ff3d00;
-            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
-        }
-        #loading {
-            display: none;
-            font-size: 1.5em;
-            margin-top: 20px;
-        }
-    </style>
-</head>
-<body>
-
-    <div class="container">
-        <div id="pointsDisplay">当前积分: </div>
-        <button id="startLotteryButton">开始抽奖</button>
-        <button class="back-button" id="backButton">返回前一页面</button>
-        <div id="result"></div>
-        <div id="loading">正在加载，请稍候...</div>
-    </div>
-
-    <script>
-        const urlParams = new URLSearchParams(window.location.search);
-        let name = urlParams.get('name');
-
-        // 如果 URL 中没有 name 参数，尝试从 localStorage 获取
-        if (!name) {
-            name = localStorage.getItem('currentUserName');
-        }
-
-        const pointsDisplay = document.querySelector('#pointsDisplay');
-        const startLotteryButton = document.querySelector('#startLotteryButton');
-        const resultDisplay = document.querySelector('#result');
-        const backButton = document.getElementById('backButton');
-        const loadingIndicator = document.getElementById('loading');
-
-        // 睡眠函数，让页面跳转更自然
-        function sleep(d) {
-            return new Promise(resolve => setTimeout(resolve, d));
-        }
-
-        // 获取该用户的积分
-        let userPoints = parseInt(localStorage.getItem(name)) || 0;
-        pointsDisplay.textContent = `${name} 的当前积分: ${userPoints}`;
-
-        // 设置返回按钮的 URL
-        backButton.onclick = () => {
-            loadingIndicator.style.display = 'block'; // 显示加载提示
-            window.location.href = `choice.html?name=${encodeURIComponent(name)}`;
-        };
-
-        // 抽奖逻辑
-        startLotteryButton.addEventListener('click', async () => {
-            if (userPoints >= 20) {
-                userPoints -= 20;  // 每次抽奖消耗 20 分
-                localStorage.setItem(name, userPoints);  // 保存更新后的积分
-                pointsDisplay.textContent = `${name} 的当前积分: ${userPoints}`;
-
-                // 随机选择奖品
-                const prizes = ["跳过权", "再来一次", "什么也没有发生", "加30积分且跳过"];
-                const randomPrize = prizes[Math.floor(Math.random() * prizes.length)];
-                resultDisplay.textContent = `你赢得了: ${randomPrize}`;
-
-                // 等待 2 秒以展示结果
-                await sleep(2000);
-                loadingIndicator.style.display = 'block'; // 显示加载提示
-
-                if (randomPrize === '跳过权') {
-                    await sleep(1000);
-                    window.location.href = `select.html?name=${encodeURIComponent(name)}`;
-                } else if (randomPrize === '再来一次') {
-                    userPoints += 20;
-                    localStorage.setItem(name, userPoints);
-                } else if (randomPrize === '什么也没有发生') {
-                    await sleep(1000);
-                    window.location.href = `answer.html?name=${encodeURIComponent(name)}`;
-                } else if (randomPrize === '加30积分且跳过') {
-                    userPoints += 30;
-                    localStorage.setItem(name, userPoints);
-                    await sleep(1000);
-                    window.location.href = `select.html?name=${encodeURIComponent(name)}`;
-                }
-            } else {
-                resultDisplay.textContent = "积分不足，无法抽奖！";
-                loadingIndicator.style.display = 'block'; // 显示加载提示
-                await sleep(1000);
-                window.location.href = `answer.html?name=${encodeURIComponent(name)}`;
-            }
-        });
-    </script>
-</body>
-</html>
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>抽奖页面</title>
+    <style>
+        body {
+            font-family: 'Arial', sans-serif;
+            height: 100vh;
+            margin: 0;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            background: linear-gradient(135deg, #6e45e2, #88d3ce);
+            color: white;
+            transition: background-color 0.5s ease;
+        }
+        .container {
+            text-align: center;
+            background-color: rgba(255, 255, 255, 0.1);
+            padding: 30px;
+            border-radius: 15px;
+            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
+            opacity: 1;
+            transition: opacity 0.5s ease;
+        }
+        #pointsDisplay {
+            font-size: 1.5em;
+            margin-bottom: 20px;
+        }
+        button {
+            padding: 12px 30px;
+            font-size: 1.1em;
+            border: none;
+            border-radius: 50px;
+            background-color: #ff5722;
+            color: white;
+            cursor: pointer;
+            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
+            transition: background-color 0.3s ease, box-shadow 0.3s ease;
+            margin: 10px;
+        }
+        button:hover {
+            background-color: #ff3d00;
+            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
+        }
+        #loading {
+            display: none;
+            font-size: 1.5em;
+            margin-top: 20px;
+        }
+    </style>
+</head>
+<body>
+
+    <div class="container">
+        <div id="pointsDisplay">当前积分: </div>
+        <button id="startLotteryButton">开始抽奖</button>
+        <button class="back-button" id="backButton">返回前一页面</button>
+        <div id="result"></div>
+        <div id="loading">正在加载，请稍候...</div>
+    </div>
+
+    <script>
+        const urlParams = new URLSearchParams(window.location.search);
+        let student_name = urlParams.get('student_name');
+        let student_id = urlParams.get('student_id');
+    
+        const pointsDisplay = document.querySelector('#pointsDisplay');
+        const startLotteryButton = document.querySelector('#startLotteryButton'); 
+        const resultDisplay = document.querySelector('#result');
+        const backButton = document.getElementById('backButton');
+        const loadingIndicator = document.getElementById('loading');
+    
+        // 睡眠函数，让页面跳转更自然
+        function sleep(d) {
+            return new Promise(resolve => setTimeout(resolve, d));
+        }
+    
+        // 全局变量，用于存储用户积分
+        let userPoints = null;
+    
+        // 获取该用户的分数
+        const fetchStudentScore = async (student_id) => {
+    try {
+        const response = await fetch('http://localhost:3000/api/get-score', {
+            method: 'POST', // 使用 POST 方法
+            headers: {
+                'Content-Type': 'application/json', // 设置请求体的内容类型
+            },
+            body: JSON.stringify({ student_id }), // 将 student_id 放入请求体
+        });
+
+        if (!response.ok) {
+            alert('分数获取失败');
+            return null; // 返回 null 表示获取失败
+        }
+
+        // 直接返回响应体中的数字
+        const data = await response.json(); // 直接解析为 JSON
+        const score  = data.score;
+        return score; // 返回数字
+    } catch (error) {
+        alert('网络请求失败');
+        return null; // 返回 null 表示获取失败
+    }
+};
+
+    
+        // 更新用户分数
+        async function updateScore(student_id, points) {
+    try {
+        const response = await fetch('http://localhost:3000/api/update-score', {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+            },
+            body: JSON.stringify({ student_id, points }),
+        });
+
+        if (!response.ok) {
+            throw new Error('网络响应不正常');
+        }
+
+        // 使用 text() 解析响应，得到字符串形式的分数
+        const data = await response.text(); 
+        let score = Number(data); // 转换为数字
+        return score; // 返回数字
+    } catch (error) {
+        console.error('分数更新失败:', error);
+        return null; // 返回 null 表示更新失败
+    }
+}
+
+    
+        // 初始化函数，用于设置用户积分
+        async function init() {
+            userPoints = await fetchStudentScore(student_id); // 获取分数并存储到全局变量
+            pointsDisplay.textContent = `${student_name} 的当前积分: ${userPoints}`;
+        }
+    
+        // 执行初始化函数
+        init();
+    
+        // 设置返回按钮的 URL
+        backButton.onclick = () => {
+            loadingIndicator.style.display = 'block'; // 显示加载提示
+            window.location.href = `choice.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
+        };
+    
+        // 开始抽奖
+        startLotteryButton.addEventListener('click', async () => {
+            if (userPoints >= 2) {
+                userPoints = await updateScore(student_id, -2); // 积分-2
+    
+                pointsDisplay.textContent = `${student_name} 的当前积分: ${userPoints}`;
+    
+                // 随机选择奖品
+                const prizes = ["跳过权", "再来一次", "什么也没有发生", "加3积分且跳过"];
+                const randomPrize = prizes[Math.floor(Math.random() * prizes.length)];
+                resultDisplay.textContent = `你赢得了: ${randomPrize}`;
+    
+                // 等待 2 秒以展示结果
+                await new Promise(resolve => setTimeout(resolve, 2000));
+                loadingIndicator.style.display = 'block'; // 显示加载提示
+    
+                if (randomPrize === '跳过权') {
+                    await sleep(2000);
+                    window.location.href = `select.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
+                } 
+
+                else if (randomPrize === '再来一次') {
+                    userPoints = await updateScore(student_id, 2); // 积分返回2
+                    await sleep(2000);
+                    window.location.href = `lottery.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
+                } 
+
+                else if (randomPrize === '什么也没有发生') {
+                    await sleep(2000);
+                    window.location.href = `answer.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
+                } 
+
+                else if (randomPrize === '加3积分且跳过') {
+                    userPoints = await updateScore(student_id, 3); // 积分+3
+                    await sleep(2000);
+                    window.location.href = `select.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
+                }
+                
+            } else {
+                resultDisplay.textContent = "积分不足，无法抽奖！返回回答问题";
+                loadingIndicator.style.display = 'block'; // 显示加载提示
+                await sleep(2000);
+                window.location.href = `answer.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
+            }
+        });
+    </script>
+    
+</body>
+</html>
