肝素的抗凝机制是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31588' and id < 2530205 and id<>'2530205' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31588' and id > 2530205 and id<>'2530205' order by id asc limit 5