正常人摄取K+多，由肾排出也增多，其主要原因是（      ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25943' and id < 2179819 and id<>'2179819' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25943' and id > 2179819 and id<>'2179819' order by id asc limit 5