患者男性，25岁，右大腿根部刀伤，出现疼痛，肿胀，活动受限。局部血管超声检查显示股动脉、股静脉之间见一无回声管道，其近端动、静脉管径明显增宽，管道处可见从动脉流向静脉的五彩镶嵌血流，静脉内出现动脉化血流频谱，为高速低阻型，其超声诊断最可能为（）。
A.股动脉血栓
B.股静脉血栓
C.股动静脉瘘
D.股静脉瓣功能不全
E.假性动脉瘤
参考答案：C
解析：由题干我们知道该患者右大腿根部刀伤后，超声检查显示股动脉、股静脉之间见一无回声管道，该处可见从动脉流向静脉的五彩镶嵌血流，说明动脉、静脉之间有一瘘口，应为股动静脉瘘。
Monday morning is an important time at our school. All of the students go to the playground. We listen to music, and we the national flag(国旗) go up. Usually, one student gives a talk on Monday mornings. One Monday last year, a boy gave the talk. He was and excited ! When I saw him, I wanted to have a try, too. Can I really do it? Last week, our teacher said our class should give the talk. My teacher me, "I know you want to have a try. Next Monday, you can give the talk. Go and write something down. for it, I'm sure you'll do well." "Thank you ," I answered, It was such a great for me ! When I got home, I was excited. I wrote two pages for the talk. I read them again and again. When I read, I asked my parents . I wanted to make my teacher happy. Monday morning came. I began to feel . When did I last give a talk to many people, never! This was my first time. Could I really it. Maybe I couldn’t finish the talk. When I got to school, we all went out to playground. I in front of everyone. I opened my mouth, but I couldn't say anything. "Take it easy," I said to . " Don't be nervous. You can do it." Just then, I looked down at everyone. I saw about 1,000 eyes. They were all looking at me ! I nearly couldn't . I looked at their eyes more carefully. Their eyes were saying , "You can do it! Don't be afraid, just talk !" I took a big . Then I began to talk. It wasn't hard. It was easy. I don't know I finished my talk. But I did it. I felt so good that day. I showed myself everyone what I can do.
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