诊断左心室血栓，应该至少在多少个切面 观察到才能确诊

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31770' and id < 2540011 and id<>'2540011' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31770' and id > 2540011 and id<>'2540011' order by id asc limit 5