中药的上、中、下三品分类法出于(  )。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25761' and id < 2164775 and id<>'2164775' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25761' and id > 2164775 and id<>'2164775' order by id asc limit 5