问题
单项选择题
高位肠梗阻和低位肠梗阻鉴别中，正确的是
A．前者肠胀气较后者明显
B．后者X线检查可见“阶梯征”
C．前者呕吐较后者出现早
D．前者可出现粪便样呕吐物
E．前者在梗阻初期即停止排便排气
答案
参考答案：C
解析：高位小肠梗阻呕吐频繁而腹胀较轻，低位小肠梗阻则反之，结肠梗阻与低位小肠梗阻的临床表现相似。
搜题请搜索小程序“爱下问搜题”
高位肠梗阻和低位肠梗阻鉴别中，正确的是
A．前者肠胀气较后者明显
B．后者X线检查可见“阶梯征”
C．前者呕吐较后者出现早
D．前者可出现粪便样呕吐物
E．前者在梗阻初期即停止排便排气
参考答案：C
解析：高位小肠梗阻呕吐频繁而腹胀较轻，低位小肠梗阻则反之，结肠梗阻与低位小肠梗阻的临床表现相似。
| 根据对话内容，选择最佳答案。 | |||
| A: What are you doing? B: I'm reading a book 1_________ Sun Yatsen. He was the father of modern China. He was very 2_________ in China. He 3_________ to change China and free the Chinese people. A: Did he free the Chinese people? B: Yes, he 4_________. And all the Chinese people 5_________ him.
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