氨基酸通过主动转运全部被重吸收，其部位是（      ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25943' and id < 2179821 and id<>'2179821' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25943' and id > 2179821 and id<>'2179821' order by id asc limit 5