为明确诊断，应首选的检査是（  ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25961' and id < 2177467 and id<>'2177467' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25961' and id > 2177467 and id<>'2177467' order by id asc limit 5