试题详情

(单选题)麻醉前,为了预防呕吐和误吸,成人择期手术前必须

A 禁食4h,禁饮12h

B 禁食12h,禁饮4h

C 禁食8h,禁饮8h

D 禁食12h,禁饮12h

E 禁食24h,禁饮24h