试卷的统计结果页面，多选题的正确率的优化

app/helpers/exercises_helper.rb

@@ -113,13 +113,15 @@ module ExercisesHelper
       if ex.question_type <= Exercise::JUDGMENT  #选择题和判断题
         standard_answer = ex.exercise_standard_answers.pluck(:exercise_choice_id).sort   #标准答案的位置
         right_users_count = 0  #该问题的回答正确的人数
-        user_ids.each do |user_id|
-          if ex.question_type == Exercise::MULTIPLE
+        if ex.question_type == Exercise::MULTIPLE  #多选题
+          user_ids.each do |user_id|
             answer_choice_array = effictive_users.select(:user_id,:exercise_choice_id).where(user_id:user_id)&.map {|s| s.exercise_choice.choice_position}.uniq
             if answer_choice_array.sort == standard_answer
               right_users_count += 1
             end
-          else
+          end
+        else  #单选题和判断题
+          user_ids.each do |user_id|
             answer_choice_array = effictive_users.select(:user_id,:exercise_choice_id).find_by(user_id:user_id)&.exercise_choice&.choice_position
             if [answer_choice_array] == standard_answer
               right_users_count += 1