问题
单项选择题
患者，男性，15岁，颅脑MRI平扫及增强扫描图像如下，应诊断为（）。
A．脑膜瘤
B．胶质瘤
C．小脑母细胞瘤
D．室管膜瘤
E．髓母细胞瘤
答案
参考答案：E
解析：
髓母细胞瘤发病年龄多在20岁以内，主要发生在小脑蚓部，容易突入第四脑室，生长迅速，最好发生脑脊液转移。囊变、钙化及出血少见。儿童后颅窝中线区实体性肿块，增强检查明显强化，多为此瘤。
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患者，男性，15岁，颅脑MRI平扫及增强扫描图像如下，应诊断为（）。
A．脑膜瘤
B．胶质瘤
C．小脑母细胞瘤
D．室管膜瘤
E．髓母细胞瘤
参考答案：E
解析：
髓母细胞瘤发病年龄多在20岁以内，主要发生在小脑蚓部，容易突入第四脑室，生长迅速，最好发生脑脊液转移。囊变、钙化及出血少见。儿童后颅窝中线区实体性肿块，增强检查明显强化，多为此瘤。
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| Sumo wrestlers (相扑选手) are usually big, heavy men. The biggest sumo wrestler of all the time is Koni-shiki, who now 1 about 230 kg. Born in Hawaii, he was 2 a big boy. When he was a teenager, some people 3 he go to Japan and become a sumo wrestler. Although he took their advice, at first it was a 4 life. "I had to clean the toilets and 5 the rubbish (垃圾)," Konishiki remembered, "I knew I had to 6 to life in Japan. I said to myself, 'I 7 learn Japanese.' Soon I could 8 it quite well." Konishiki's career started 9 , and he was soon upgraded to a higher rank. But despite his 10 he soon had health problems. The doctors told him that he should 11 some weight. "I started dieting. I 12 to do it. But I did it too 13 ," he said, "I lost some of my strength, too." He lost a lot of fights, and then his parents got 14 in a car crash. "I must go and 15 them," he thought. Though it was only three days 16 a big tournament (锦标赛), he flew back to Hawaii. Despite his 17 , they were not badly injured. When he returned, he knew that he had to do well. The newspapers said, "Konishiki must win, 18 he will go down in rank." Though he had many problems, Konishiki won 14 of his 15 fights, and won the Emperor's Cup. He was so 19 that he cried. "You ought not to show your feelings," he said, "but I couldn't 20 it." | |||
| ( )1．A. means ( )2．A. always ( )3．A. promised ( )4．A. real ( )5．A. sell ( )6．A. adapt ( )7．A. would ( )8．A. speak ( )9．A. bad ( )10. A. failure ( )11. A. gain ( )12. A. failed ( )13. A. stupidly ( )14. A. shocked ( )15. A. visit ( )16. A. after ( )17. A. joy ( )18. A. because ( )19. A. sad ( )20. A. do | B. measures B. hardly B. allowed B. hard B. bring B. respond B. can B. say B. well B. success B. lose B. began B. carefully B. destroyed B. care B. since B. worry B. but B. nervous B. help | C. weighs C. sometimes C. considered C. comfortable C. take C. devote C. must C. learn C. suddenly C. effort C. save C. had C. slowly C. ruined C. meet C. before C. surprise C. or C. curious C. feel | D. has D. once D. suggested D. rich D. empty D. lead D. may D. tell D. similarly D. fame D. spare D. refused D. quickly D. injured D. serve D. until D. regret D. and D. happy D. leave |