diff --git a/src/dinner.py b/src/dinner.py
index 1544ab8..0b5a53e 100644
--- a/src/dinner.py
+++ b/src/dinner.py
@@ -33,7 +33,7 @@ def fetch_user_menu_summary() -> dict[str, float]:
     all_menu = list(fetch_all_user_today_menu())
     if len(all_menu) > 0:
         menus = list(map(lambda x: json.loads(x[1]), all_menu))
-        menu_keys = set(chain.from_iterable(menus))
+        menu_keys = set(chain(*menus))
         result = {}
         for k in menu_keys:
             result[k] = 0
@@ -79,6 +79,7 @@ def vote_reduce(summary: dict[str, float]) -> tuple[dict[str, float], float, str
         name, _, expression = menu
         if expression is None or name not in summary.keys():
             continue
+        # 计算预定路由规则
         new_name = eval(expression, {'total_vote': total_vote})
         if new_name != name:
             if summary.get(new_name) is None:
@@ -86,9 +87,9 @@ def vote_reduce(summary: dict[str, float]) -> tuple[dict[str, float], float, str
             else:
                 summary[new_name] += summary[name]
             summary[name] = 0
-    for k in summary:
-        if last_result == k:
-            summary[k] = summary[k] * 7 / 10
+    # 昨日中签项降低权重
+    if last_result in summary:
+        summary[last_result] = summary[last_result] * 7 / 10
     total_vote = sum(value for value in summary.values())
     return summary, total_vote, last_result
 
@@ -109,10 +110,12 @@ def dinner_update():
         set_user_menu('')
         return make_response(json.dumps(dict(code=0, data="OK")))
     user_menu = json.loads(user_menu)
+    # 计算总投票数值
     summary = sum(abs(int(value)) for value in user_menu.values())
     if summary <= 0:
         set_user_menu('')
         return make_response(json.dumps(dict(code=0, data="OK")))
+    # 投票数归一化
     for key in user_menu:
         user_menu[key] = abs(int(user_menu[key])) / summary
     set_user_menu(json.dumps(user_menu, ensure_ascii=False))
@@ -128,12 +131,9 @@ def dinner_roll():
     if check_roll() != 1:
         return make_response(json.dumps(dict(code=-1, data="目前不能抽签")))
     summary, _, _ = vote_reduce(fetch_user_menu_summary())
-    for k in summary:
-        summary[k] = int(round(summary[k] * 100))
-    pool = []
-    for k in summary:
-        for i in range(int(summary[k])):
-            pool.append(k)
+    # 票数乘以100四舍五入取整，投入抽奖池
+    pool = list(chain(*[[name] * int(round(summary[name] * 100)) for name in summary]))
+    # Knuth-Durstenfeld Shuffle算法洗牌: 从后往前依次随机将未乱序元素交换到当前位置，直到所有元素均被打乱
     random.shuffle(pool)
     result = pool[0]
     set_roll_result(result)
diff --git a/templates/dinner.html b/templates/dinner.html
index 1bd9f26..4b3e450 100644
--- a/templates/dinner.html
+++ b/templates/dinner.html
@@ -35,7 +35,7 @@
     <div style="padding-top: 40px">
         <label>大家的选择 - 总票数:{{ '{:.2f}'.format(total_vote | round(2)) }}</label>
         <ul style="padding-top: 20px; margin-bottom: 80px" class="list-group">
-            {% for key in summary %}
+            {% for key in summary|dictsort(true) %}
                 <li class="list-group-item {{ "active" if result == key else "" }}">
                     <div class="row justify-content-between">
                         <span class="col-5">{{ key }}</span>