21-三体综合征的主要临床特征为() ["A．低出生体重+体格发育迟缓","B．多发畸形+宫内发育迟缓","C．宫内发育迟缓+皮肤纹理异常","D．多发畸形+皮肤纹理异常","E．以上都不是"]
试述耵聍栓塞的症状及处理。
Circumscribed otitis externa
女，28岁，反复咯血半月余，CT检查如图，最可能的诊断是() ["A．肺结核","B．肺癌","C．间质性肺炎","D．支气管扩张","E．肺脓肿"]
Aural pseudocyst
otitis externa diffusa
