患者，男，主诉右眼急性视力下降3天，眼底检查见视网膜广泛出血，视网膜静脉扩张迂曲，最先考虑的是（）
A.视网膜中央静脉阻塞
B.视网膜中央动脉阻塞
C.原田病
D.球后视神经炎
E.视网膜脱离
参考答案：A
解析：视网膜中央静脉阻塞视网膜出血的范围广，水肿明显，动脉变细，静脉充盈扩张伴视盘水肿、充血，可出现棉絮斑，题干提供的信息与此表现相似，故选A。
| 从下面方框中选择适当的选项填入短文中，使短文通顺、完整。选项中有两个选项是多余选项。 | |
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| On a snowy evening, a rich lady was standing by the road. She was very worried. Her 1. had broken down. Just then a poor man named Robert came. He was on his way back home from work as usual. The lady wondered, "Is the man going to help me? He looks very cold and hungry." But to her 2. , he stopped and said with a smile, "What's wrong, madam?" The lady told him what was happening. After forty minutes, the car was at last fixed by Robert. The lady wanted to pay him. "No, that's 3. , madam." he said, "I was just helping someone in need. If you really want to pay me back, I hope 4. you see someone in trouble, please give him a hand." A few minutes later, the lady saw a shabby (破旧的) house by the road. She 5. Robert's words, so she stopped. The hostess(女主人) warmly asked her in. The lady could see that was a 6. family and they needed help. When the hostess was making tea in the kitchen, the lady 7. 500 dollars on the table and went away quietly. Robert came home later than before, thinking how hard their life was. Their 8. was to be born the next month but there wasn't 9. money. His wife went up to him, gave him a kiss and said softly, "Don't worry, dear! Everything's going to be all right. A stranger has helped us out." Let's always be ready to help others because helping others is helping 10. . |