第10题: [单项选择]对肝炎后肝硬化的诊断,下列哪项最有价值() A. 脾大 B. 蜘蛛痣 C. 肝功能不正常 D. 超声波显示肝回声不均质 E. 食管钡餐检查下段有蚯蚓样充盈缺损 参考答案:E 答案解析:食管钡餐检查下段有蚯蚓样充盈缺损,提示为肝硬化特有的食管下段静脉曲张的征象,所以对诊断肝硬化最有价值,而其他几项仅提示肝脏可能有病,无特异性诊断价值。
第16题: [单项选择]According to the passage, scientists have discovered that influenza viruses ______ . A. cause ill health in wild birds B. do not always cause symptoms in birds C. are rarely present in wild birds D. change when transferred from animals to man 参考答案:B