使用无菌持物钳夹取凡士林纱布后应立即放回无菌容器内保存，防止污染。 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30940' and id < 2490508 and id<>'2490508' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30940' and id > 2490508 and id<>'2490508' order by id asc limit 5