怎么如如下loop循环添加限制输出条数的条件？<ul class="picList">
{loop archive($_catid,$_typeid,$_spid,$_area,$_length,$_ordertype,$_limit,$_image,$_attr1,$_son,$_wheretype,$_tpl,$_intro_len,$_istop) $archive}<li><a href="{$archive['url']}"><s><img src="{$archive['thumb']}" alt="{$archive['stitle']}"/></s><span>{$archive['stitle']}</span></a></li>{/loop}
</ul>
{loop archive($_catid,$_typeid,$_spid,$_area,$_length,$_ordertype,$_limit,$_image,$_attr1,$_son,$_wheretype,$_tpl,$_intro_len,$_istop) $archive}<li><a href="{$archive['url']}"><s><img src="{$archive['thumb']}" alt="{$archive['stitle']}"/></s><span>{$archive['stitle']}</span></a></li>{/loop}
</ul>
但 loop 的用法只有 {loop 数据 别名}