第3题: [单项选择]胃十二指肠溃疡外科手术的绝对适应证是() A. 溃疡病穿孔 B. 应激性溃疡 C. 瘢痕性幽门梗阻 D. 胃后壁溃疡 E. 溃疡病出血 参考答案:C 答案解析:胃、十二指肠溃疡病人因幽门管、幽门溃疡或十二指肠球部溃疡反复发作形成瘢痕狭窄,合并幽门痉挛水肿可以造成幽门梗阻。瘢痕性幽门梗阻是外科手术治疗的绝对适应证。术式以胃大部切除为主,也可行迷走神经干切断术加
A. They could employ large numbers of slaves in cotton plantations. B. They could only produce cotton. C. The black people could go to the north to make money. D. They could unite the southern states. 参考答案:A