临床上最容易获得的，又最能反映机体内环境状况的是（ )0

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30912' and id < 2487601 and id<>'2487601' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30912' and id > 2487601 and id<>'2487601' order by id asc limit 5