男性，28岁。下腹痛伴脓血便2周，腹痛常于便后缓解。查体无异常发现。首选的检查是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29201' and id < 2376140 and id<>'2376140' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29201' and id > 2376140 and id<>'2376140' order by id asc limit 5