下列关于蜘蛛痣的叙述，正确的是()
A．是皮肤小动脉扩张所致
B．是皮肤毛细血管扩张所致
C．多分布于下腔静脉回流区
D．是体内雌激素生成增多所致
E．以上均不是
参考答案：D
解析：蜘蛛痣是皮肤小动脉末端分支性扩张所形成的血管痣，因形似蜘蛛而得名。其出现部位多在上腔静脉分布区，如面、颈、手背、上臂、前胸和肩部等处。蜘蛛痣的发 生一般认为与雌激素增多有关。常见于慢性肝炎、肝硬化病人，健康妇女在妊娠期间、月经前或月经期偶尔也可出现蜘蛛痣。
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| A while ago, I didn't think I had a passion. I would sit in front of the TV all day and not think about anything except the next 1 . At that time, I didn't know how 2 it was to have a passion in our life. The first 3 I thought about this was in the seventh grade when I went to school with my mom. As we stopped at a red light, someone 4 my eyes. It was a man dressed in old 5 standing on the other side of the 6 . This homeless man was not sitting down with a sad and hopeless 7 . He was standing,waving his hands and dancing. He looked happy and held a radio as if it was the most 8 thing he had. Seeing all this 9 me. "Mom, why does that man have a radio even though he's homeless?" I asked. "He bought it," she replied. I was still 10 . "But if he's homeless, why doesn't he use his money to buy clothes? He 11 his money on something he doesn't need. He should buy food." "Well, Sarah, sometimes food isn't the most important thing. 12 can be food for the 13 . Food and clothes aren't the only things we need. People need happiness to stay 14 , too." I wasn't sure whether I 15 my mother's words. Maybe my mom was right. If one lives in sadness, there's 16 to keep him moving from day to day. Now I 17 that I've had passions all along, but never recognized their importance in my life. They were invisible (无形的) hopes that I 18 without knowing them. What's often forgotten is that we all need a 19 , a light on a 20 day. We all need a passion. | ||||
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