您需要通过以下方式包括评论功能comments_template(), 因为这个函数不仅仅包括comments.php, 文件，但也处理显示注释所需的所有查询和函数。

虽然the Codex doesn\'t really get into details, 你可以看到，by looking at source, 发生了什么：

<?php
/**
 * Loads the comment template specified in $file.
 *
 * Will not display the comments template if not on single post or page, or if
 * the post does not have comments.
 *
 * Uses the WordPress database object to query for the comments. The comments
 * are passed through the \'comments_array\' filter hook with the list of comments
 * and the post ID respectively.
 *
 * The $file path is passed through a filter hook called, \'comments_template\'
 * which includes the TEMPLATEPATH and $file combined. Tries the $filtered path
 * first and if it fails it will require the default comment template from the
 * default theme. If either does not exist, then the WordPress process will be
 * halted. It is advised for that reason, that the default theme is not deleted.
 *
 * @since 1.5.0
 * @global array $comment List of comment objects for the current post
 * @uses $wpdb
 * @uses $post
 * @uses $withcomments Will not try to get the comments if the post has none.
 *
 * @param string $file Optional, default \'/comments.php\'. The file to load
 * @param bool $separate_comments Optional, whether to separate the comments by comment type. Default is false.
 * @return null Returns null if no comments appear
 */
?>