青年男性，颊侧牙龈溃疡3个月，经两周抗感染治疗不愈。为明确诊断，应选用的检查为

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29987' and id < 2430135 and id<>'2430135' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29987' and id > 2430135 and id<>'2430135' order by id asc limit 5