需要防止“返砂”现象产生的是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30815' and id < 2481676 and id<>'2481676' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30815' and id > 2481676 and id<>'2481676' order by id asc limit 5