穿好无菌衣，带好无菌手套，应保持清洁的部位是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30938' and id < 2490307 and id<>'2490307' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30938' and id > 2490307 and id<>'2490307' order by id asc limit 5