测定基础代谢率前应禁食的时间为（ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28309' and id < 2316814 and id<>'2316814' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28309' and id > 2316814 and id<>'2316814' order by id asc limit 5