患者，女性，41岁，因右眼剧烈眼痛、畏光、流泪及视力下降2个月来诊。此前曾在当地给予抗生素、糖皮质激素和抗病毒眼液滴眼治疗，症状无改善，且有加重趋势。眼部检查：右眼视力0．5，矫正无提高。结膜混合充血，上方、鼻侧及颞侧角膜缘溃疡形成，约占3/4象限（8点钟至5点钟），最宽处位于角膜11点钟约5mm，溃疡与角膜缘之间无透明角膜间隔，其朝向角膜中央方向有一个潜掘状的浸润进行缘。前房深度正常，房水闪辉（±），未见积脓。左眼视力1.0，检查未见异常。患者既往身体健康，否认风湿、类风湿等免疫性疾病，入院后全血细胞计数和分类值正常、全身类风湿因子（RF）、抗核抗体（ANA）、抗中性粒细胞胞浆抗体均为阴性。
患者最可能的诊断是（）。
A.真菌性角膜溃疡
B.棘阿米巴角膜溃疡
C.蚕食性角膜溃疡
D.Terrien角膜边缘变性
E.角膜缘炎
参考答案：C
| 完形填空。 | |||
| Time spent in a bookshop can be enjoyable. __1 you go to a good shop, no assistant will come near to you and say, "Can I help you?" You __2 buy anything you don't want. You may try to find out. __3 the book you want is. But if you fail, the assistant will lead you there and then he will go away. It seems that he is __4 selling any books at all. There is a story which tells us about a good shop. A medical student __5 a very useful book in the shop, 6 it was too expensive for him to buy. He couldn't get it from the library, either. So every afternoon, he went there to read _ 7 at a time. One day, however, he couldn't find __8 _ from its usual place and was leaving when he saw an assistant signing to him. To his surprise, the assistant pointed to the book __9 ,"1 put it there so as not to be sold out," said the assistant. Then he __10 the student to go on with his reading. | |||
| ( )1. A. If ( )2. A shouldn't ( )3. A. what ( )4. A surprised at ( )5. A. bought ( )6. A. but ( )7. A. little ( )8. A. the book ( )9. A. in a bookshop ( )10. A. left | B. Because B. needn't B. which B. not surprised at B. found B. and B. a little B. the shop B. in his hand B. let | C. When C. mustn't C. where C. interested in C. read C. so C. few C. the assistant C. in a corner C. helped | D. But D. can't D. when D. not interested in D. took D. or D. a few D. the shopkeeper D. in his pocket D. taught |