案例：男，74岁，因劳累后气短、心悸1周入院。查体：颊部紫红色，口唇发绀，心尖部闻及舒张期杂音。若明确诊断，最佳检查是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30620' and id < 2469621 and id<>'2469621' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30620' and id > 2469621 and id<>'2469621' order by id asc limit 5