代谢性碱中毒的常见病因是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30938' and id < 2490224 and id<>'2490224' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30938' and id > 2490224 and id<>'2490224' order by id asc limit 5