第1题: [单项选择]患者男,30岁,上腹部饱胀、嗳气,呕宿食,无胆汁几月余,腹上部饱满,未扪及实质性肿块,无压痛及反跳痛,胃振水音阳性,临床诊断最可能是() A. 十二指肠溃疡瘢痕性幽门梗阻 B. 慢性胃炎 C. 急性胃扩张 D. 良性十二指肠淤滞症 E. 胃溃疡 参考答案:A 答案解析:瘢痕性幽门梗阻的临床表现为:突出的症状为腹痛与反复发作的呕吐,常定时发生在晚间或下午,呕吐量大,呕吐物多为宿食,不含胆汁。腹部检查:上腹部隆起,有时有胃蠕动波,可闻振水音。X线钡餐检查:24小时仍有钡
第18题: [单项选择]As a vessel changes course to starboard,the compass card in a magnetic compass(). A. remains aligned with compass north B. also turns to starboard C. first turns to starboard then counterclockwise to port D. turns counterclockwise to port 参考答案:A