开展医院内感染的预防关键是一级预防，与一级预防有关的措施是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29721' and id < 2413900 and id<>'2413900' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29721' and id > 2413900 and id<>'2413900' order by id asc limit 5