我有这个循环，效果很好，但cpt Studio是分层的，我只想在循环中显示第一级帖子。。我找不到解决方案。。。

<?php

$post_type = \'studio\';

// Get all the taxonomies for this post type


   $taxonomies = get_object_taxonomies( array( \'post_type\' => $post_type ) );


foreach( $taxonomies as $taxonomy ) :


// Gets every "category" (term) in this taxonomy to get the respective posts
$terms = get_terms( $taxonomy );

foreach( $terms as $term ) : ?>

    <div class="col-lg-3 col-xs-12 box">

          <div class="inner-content">

    <?php $args = array(
            \'post_type\' => $post_type,
            \'posts_per_page\' => -1, 
            \'tax_query\' => array(
                array(
                    \'taxonomy\' => $taxonomy,
                    \'field\' => \'slug\',
                    \'terms\' => $term->slug,

                )
            )

        );

    $posts = new WP_Query($args);
    if( $posts->have_posts() ): while( $posts->have_posts() ) : $posts->the_post(); ?>

    <a href="<?php echo get_permalink(); ?>" title="Read more about <?php echo get_the_title(); ?>">
        <?php  echo get_the_title(); ?>
    </a>

    <?php endwhile; endif; ?>

               </div>

         </div>



    <?php endforeach;

endforeach; ?>