第13题: [单项选择]患者，男，43岁。突然右上腹痛，伴寒战、高热。查体：体温39～40℃（属弛张热），肝大，右上腹触痛伴肌紧张。辅助检查：白细胞增高，核左移；胸腹部透视见右膈肌升高，运动受限；超声示液平；放射性核素扫描见肝占位。初步诊断为（） A. 肝癌 B. 急性肝炎 C. 阿米巴性肝脓肿 D. 细菌性肝脓肿 E. 胆道感染 参考答案:D 答案解析:患者起病急，寒战、高热，白细胞升高，核左移，肝区疼痛、肝大，为细菌性肝脓肿的典型临床表现。结合超声、胸腹部透视及放射性核素扫描结果，应首先考虑细菌性肝脓肿。
A. it was very durable B. the tools and weapons were made of stone C. there was little vegetation D. the people lived in caves 参考答案:B 答案解析:[听力原文]11-13 The Stone Age was a period of history which began in approximately 2 million B.C.
