胃肠超声检査前需做的准备工作，下列哪 项是不需要的

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31774' and id < 2540394 and id<>'2540394' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31774' and id > 2540394 and id<>'2540394' order by id asc limit 5