剂量与点源距离的关系为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30406' and id < 2458151 and id<>'2458151' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30406' and id > 2458151 and id<>'2458151' order by id asc limit 5