单项选择题

A3/A4 题型 男75岁,因十二指肠溃疡造成幽门梗阻,恶心呕吐,术前3日,用高渗盐水洗胃以减轻胃黏膜税种和炎症,利于术后恢复,为幽门梗阻患者洗胃的适宜时间是
A、饭后0.5h
B、饭后1h
C、饭后2h
D、饭后3h
E、空腹

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