A.讓胃腸道適當(dāng)?shù)男菹?br /> B.防止麻醉或手術(shù)過程中發(fā)生嘔吐 C.減少胃腸道手術(shù)時(shí)的污染 D.防止術(shù)后腹脹 E.減少術(shù)后排便