在DateTag例子中不需要加入正文内容，因为它只显示当前日期。

We do not need to include body content in our example DateTag, because it only displays the current date.

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根据用户提交的搜索参数，使用迭代方式构建查询，并将查询限制到那些可以在当前日期内有效显示的已批准清单。

Construct this query iteratively, depending on the search parameters submitted by the user, and restrict it to only those approved listings that are valid for display on the current date.

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它将显示在顶部导航栏上，指向当前日期的天视图。

It will be displayed on the top navigation bar and points to the day view of the current date.

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