双香豆素在体内抗凝有效，不用于体外抗凝。 （ )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30918' and id < 2488127 and id<>'2488127' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30918' and id > 2488127 and id<>'2488127' order by id asc limit 5