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【单选题】
,38 岁,不慎被烧伤。烧伤面积达40%,创面感染,需换药。无菌治疗巾包打开后,剩余的治疗巾按原折痕包好有效的使用时间为( )A.
4h
B.
8h
C.
12h
D.
24h
E.
48h
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