男性，38岁。四肢无力3 天。病前半月患腹泻。查体：四肢肌力3级，肌 张力低，腱反射减弱，病理征阴性。该患者应首选的检查是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31998' and id < 2555637 and id<>'2555637' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31998' and id > 2555637 and id<>'2555637' order by id asc limit 5