若对此次事件进行现场调查，除向当地居民调查询问外，必须进行实验室检测的样本是

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='61561' and id < 3910167 and id<>'3910167' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='61561' and id > 3910167 and id<>'3910167' order by id asc limit 5