多亏toschos的提示，我才能解决这个问题。这是我使用的代码：

// Register the endpoint
function my_init() {
    add_rewrite_endpoint(\'votes\', EP_ALL);
}
add_action(\'init\', \'my_init\');


// Execute a function when the endpoint is called
function my_redirect() {
    global $wp_query;

    if (isset($wp_query->query_vars[\'votes\'])) {
        $wp_query->is_404 = false;
        add_filter( \'wp_title\', \'my_title_votes\', 10, 2 );
        // this will output the template-file "all-votes.php"
        get_template_part( \'all-votes\' );
        // Prevent WordPress from adding the front-page or 404 page to my output...
        die();
    }
}
add_action( \'template_redirect\', \'my_redirect\' );

function my_title_votes( $title, $sep ) {
    return \'Votes-Title \' . $sep . \' \' .  $title;
}