生脉散中五味子的主要作用是(  )。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25833' and id < 2169882 and id<>'2169882' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25833' and id > 2169882 and id<>'2169882' order by id asc limit 5