患者男性，45岁，因“头痛3个月，行走不稳1个月”来诊。既往体健，家族中无遗传性病史。血压124/78mmHg（1mmHg=0.133kPa），意识清，语利，眼球活动无障碍，视力正常，四肢自主活动，肌力5级，肌张力正常，闭目难立征阳性，指鼻试验阴性。外院颅脑CT示右侧小脑低密度占位性病变。
提示：颅脑MRI增强扫描示右小脑可见一2.6cm×1.9cm×2.7cm大小囊性病灶，囊壁未见强化，边界光滑，瘤结节明显强化，瘤周无或轻度水肿。最有可能的诊断是（）
A.毛细胞型星形细胞瘤
B.蛛网膜囊肿
C.血管母细胞瘤
D.脑脓肿
E.转移瘤
参考答案：C
| 完形填空。 | |||
| Are only clever and good-looking students happy in the school? Best-selling 1 Xiao Nizi (Nini) doesn't think so. " 2 has his own place in the sky." she said. "We're all special in our own ways." Nini, from Hunan, writes stories about young people in the school. Her books, 3 Devils Kiss and Un-e on Midsummer's Night, are very 4 with students. In her stories, the main characters are usually common girls who are neither pretty 5 smart. But they always win the love of a Prince Charming (白马王子), or 6 successful stars. "It's not because of luck."' said Nini.""They are 7 honest and they don't lie. They know what they arc good 8 and work hard to realize their dreams." Nini herself is like one of the characters in her stories. She was a shy girl at school. But she thought a lot and liked languages, and that made her 9 to be a writer. She hopes her stories 10 make more kids happy. | |||
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