织梦dedecms无限加载瀑布流指定模型

$sql = "SELECT a.*,t.typedir,t.typename,t.isdefault,t.defaultname,t.namerule,
        t.namerule2,t.ispart, t.moresite,t.siteurl,t.sitepath
FROM `dede_archives` as a JOIN `dede_arctype` AS t ON a.typeid=t.id    where a.channel=1 ORDER BY id DESC LIMIT $start,$pagesize";