肺痈的诊断，主要应掌握的一项是(  )。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25921' and id < 2174944 and id<>'2174944' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25921' and id > 2174944 and id<>'2174944' order by id asc limit 5