按库氏分段法可将肝脏分为 几段

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31785' and id < 2541198 and id<>'2541198' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31785' and id > 2541198 and id<>'2541198' order by id asc limit 5