患者，女性，40岁。患支气管扩张，突然一次咯血600ml。病人烦躁，面色苍白，皮肤湿冷。血压85/70mmHg，脉搏每分钟90次。
可能出现的微循环改变有（）
A.微血管收缩-扩张-麻痹
B.毛细血管后动脉收缩，动静脉短路开放
C.微动脉阻力增高，保持静脉回心血量
D.毛细血管网广泛开放，回心血量剧减
E.出现弥散性血管内凝血，血液灌流完全停止
参考答案：C
| Cloze test. | ||||
| People in communities have slowly been pushed apart through the years, mostly because people simply aren't taking the time to say a simple "hello." After considering this phenomenon, I decided I was going to 1 the way I was doing things. My 2 came one morning when I was in the community library. I passed by a girl who 3 her books out of her locker. Thinking like most that someone else would help her pick them up, I continued my way. However, when I had to 4 because I stupidly forgot my book, I noticed she had just finished packing them up by herself. No one had stopped to 5 her. "OK," I thought to myself, "this is where I should have changed." My best opportunity came a few days later when I saw a man 6 by himself waiting for the library to open, so I sat down next to him and began a 7 . It was difficult to get started, and even when I had to say goodbye, almost every 8 from my new friend had a tone (语气) of doubt in it. And who could blame him? People aren't used to making an 9 chat with a stranger. But a change, no matter how 10 it is needed, doesn't just happen. It takes people like us to make it possible. I 11 you to take a small step out of your comfort zone and try to make someone's day a little brighter. Together, we can really make society come 12 as a whole. | ||||
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