超声诊断肝脓肿必须具备的条件是（  ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27180' and id < 2251643 and id<>'2251643' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27180' and id > 2251643 and id<>'2251643' order by id asc limit 5