辐射剂量只要控制在可接受的指导水平即可，不需要考虑是否达到最 优化。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30407' and id < 2458218 and id<>'2458218' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30407' and id > 2458218 and id<>'2458218' order by id asc limit 5