患者，44岁，作下肢静脉瓣膜功能试验，先平卧，抬高患肢，待曲张

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患者，44岁，作下肢静脉瓣膜功能试验，先平卧，抬高患肢，待曲张静脉瘀血排空后，在大腿根部扎止血带，病人站立后30秒内曲张静脉迅速充盈，说明何处瓣膜功能不全______

A．大隐静脉 B．小隐静脉
C．深静脉
D．交通支
E．以上均不是

答案

参考答案：B

解析：大隐静脉瓣膜功能试验：用来测定大隐静脉瓣膜的功能，方法是患者平卧位，下肢抬高，排空浅静脉内的血液，用止止血带绑在大腿根部，卵圆窝下方处。随后让病人站立，10s内解开止血带，大隐静脉血柱由上向下立即充盈，则提示大隐静脉瓣膜功能不全。如果病人站立后，止血带未解开而止血带下方的浅静脉迅速充盈，说明返流入该静脉的血液来自小隐静脉。

阅读理解

阅读理解。

        Even a child knows that nodding the head means "yes". But some people will probably be puzzled when the
y first come to India. When they talk to an Indian, he often shakes his head. They might think that the Indian
does not like what he said, but on the contrary, he is expressing agreement.
        The Indians have a habit of shaking their heads slightly when they talk to somebody. It doesn't mean "No",
but "Yes". If a person doesn't know this, it might cause misunderstanding (误解).
        At one time a foreigner in India told his driver who was an Indian to take him to his office. The driver
shook his head. The foreigner said his request again and again and the driver still shook his head. At last, the
foreigner shouted angrily, "Drive me to my office at once!" The driver said in a low voice, "Yes, sir," smiling
and shaking his head again at the same time.

1. In general, nodding the head means______ and shaking the head means _______.

[ ]

A. "Yes"… "No"
B. "No"… "Yes"
C. "Yes"… "Yes"

2. According to the habit of India, if someone agree with you, he will _________.

[ ]

A. nod his head
B. shake his head
C. neither nod his head and shake his head

3. Why did the Indian driver shake his head when the foreigner asked him to drive to him to his office? Because
_________.

[ ]

A. the Indian driver had something important to do
B. the foreigner agreed to give him only a little money
C. in India shaking the head means agreement