第7题: [单项选择]为及时明确呕血的原因应选用下列哪种方法() A. 选择性腹腔血管造影 B. 上消化道内镜检查 C. 上消化道双重对比造影 D. MRI检查 E. B超检查 参考答案:B 答案解析:胃镜和结肠镜是诊断消化道出血病因、部位和出血情况的首选方法;多在出血24~48小时内进行,称急诊胃镜和结肠镜检查。
第8题: [单项选择]People thought Merlin was a dreamer because he ______. A. often gave others surprises B. was a gifted musician C. invented the roller skates D. was full of imagination 参考答案:D 答案解析:[分析] 第一段最后两句Joseph Merlin was a man of ideas and dreams.People called him a dreamer.D“充满幻想”,最合适。