jQuery：多个同名复选框字段，但使用$（this）选择器

I have multiple checkboxes:

我有多个复选框：

<div class="abc">
  <%= check_box_tag "closed" %>
  <%= select_tag :time %>
</div>
<div class="abc">
  <%= check_box_tag "closed" %>
  <%= select_tag :time %>
</div>
<div class="abc">
  <%= check_box_tag "closed" %>
  <%= select_tag :time %>
</div>
<div class="abc">
  <%= check_box_tag "closed" %>
  <%= select_tag :time %>
</div>
<div c