diff --git a/app/helpers/exercises_helper.rb b/app/helpers/exercises_helper.rb
index 2a052fffe..856f808d7 100644
--- a/app/helpers/exercises_helper.rb
+++ b/app/helpers/exercises_helper.rb
@@ -355,9 +355,9 @@ module ExercisesHelper
     exercise_questions = exercise.exercise_questions.includes(:exercise_answers,:exercise_shixun_answers,:exercise_standard_answers,:exercise_shixun_challenges)
     exercise_questions.each do |q|
       if q.question_type != 5
-        answers_content = q.exercise_answers.search_answer_users("user_id",user.id)  #学生的答案
+        answers_content = q.exercise_answers.where(user_id: user.id)  #学生的答案
       else
-        answers_content = q.exercise_shixun_answers.search_shixun_answers("user_id",user.id)  #学生的答案
+        answers_content = q.exercise_shixun_answers.where(user_id: user.id)  #学生的答案
       end
       if q.question_type <= 2  #为选择题或判断题时
         if answers_content.present?   #学生有回答时
@@ -369,11 +369,11 @@ module ExercisesHelper
           standard_answer = q.exercise_standard_answers.pluck(:exercise_choice_id).sort  #该问题的标准答案，可能有多个
           if user_answer_content == standard_answer  #答案一致,多选或单选才给分，答案不对不给分
             if standard_answer.count > 0
-              q_score_1 = (q.question_score / standard_answer.count)   #当多选答案正确时，每个answer的分数均摊。
+              multi_each_score = (q.question_score / standard_answer.count)   #当多选答案正确时，每个answer的分数均摊。
             else
-              q_score_1 = 0.0
+              multi_each_score = 0.0
             end
-            answers_content.update_all(:score => q_score_1)
+            answers_content.update_all(:score => multi_each_score)
             score1 = score1 + q.question_score
           end
         else
@@ -424,7 +424,7 @@ module ExercisesHelper
             end
             ex_shixun_answer_content = answers_content&.where(exercise_shixun_challenge_id: exercise_cha.id)
             if ex_shixun_answer_content.blank?  #把关卡的答案存入试卷的实训里
-              cha_path = challenge_path exercise_cha.challenge&.path
+              cha_path = challenge_path(exercise_cha.challenge&.path)
               game_challenge = game.game_codes.search_challenge_path(cha_path)&.first
               if game_challenge.present?
                 game_code = game_challenge
diff --git a/app/helpers/export_helper.rb b/app/helpers/export_helper.rb
index af883131a..22c10bdb3 100644
--- a/app/helpers/export_helper.rb
+++ b/app/helpers/export_helper.rb
@@ -89,11 +89,12 @@ module ExportHelper
         if teacher_comments.present?
           w_18 = ""
           teacher_comments.each do |t|
-            user_name = t.user.real_name
+            user_name = t.user&.real_name
             user_time = format_time(t.updated_at)
-            user_score = t.score
-            user_comment = t.comment
-            w_18 = w_18 + ("教师:" + user_name + "\n" + "时间:" + user_time.to_s + "\n" + "分数:" + user_score.to_s + "分" + "\n" + "评语:" + user_comment + "\n\n")
+            user_score = t&.score
+            user_comment = t&.comment
+            comment_title = "教师:#{user_name}\n时间:#{user_time.to_s}\n分数:#{user_score.to_s}分\n评语:#{user_comment}\n\n"
+            w_18 = w_18 + comment_title
           end
         else
           w_18 = "--"
@@ -160,11 +161,13 @@ module ExportHelper
         if teacher_comments.present?
           w_18 = ""
           teacher_comments.each do |t|
-            user_name = t.user.real_name
+            user_name = t.user&.real_name
             user_time = format_time(t.updated_at)
-            user_score = t.score
-            user_comment = t.comment
-            w_18 = w_18 + ("教师:" + user_name + "\n" + "时间:" + user_time.to_s + "\n" + "分数:" + user_score.to_s + "分" + "\n" + "评语:" + user_comment + "\n\n")
+            user_score = t&.score
+            user_comment = t&.comment
+            comment_title = "教师:#{user_name}\n时间:#{user_time.to_s}\n分数:#{user_score.to_s}分\n评语:#{user_comment}\n\n"
+            # ("教师:" + user_name + "\n" + "时间:" + user_time.to_s + "\n" + "分数:" + user_score.to_s + "分" + "\n" + "评语:" + user_comment + "\n\n")
+            w_18 = w_18 + comment_title
           end
         else
           w_18 = "--"