( )是人体内含量最髙的微量元素，是合 成血红蛋白的原料，参与维持正常造血功能和体内 氧的运送。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26243' and id < 2196818 and id<>'2196818' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26243' and id > 2196818 and id<>'2196818' order by id asc limit 5