食管癌的早期临床表现不包括() ["食管内异物感","胸骨后针刺样疼痛","咽下食物时梗噎感","进行性吞咽困难","上腹部烧灼感"]
某患者因哮喘发作来诊,在诊断尚未明确时,为缓解症状应选用() ["肾上腺素","强心苷","异丙肾上腺素","氨茶碱","哌替啶"]
肺心病时最常见的心脏改变是() ["左心房肥大","右心房肥大","右心室肥大","左心室肥大","左心房+左心室肥大"]
关于食管的描述正确的是() ["食管是管径上下均匀一致的肌性管道","食管的两端经常处于开放状态","食管可分为颈部,胸部和腹部三部分","食管的腹部最长","食管由平滑肌组成"]
慢性肺心病肺心功能代偿期不具有的体征是() ["肺动脉瓣区第二心音亢进","肺气肿征","颈静脉充盈","剑突下心脏收缩期搏动","右心室奔马律"]
张先生,34岁。转移性右下腹痛2天,加重6小时。腹痛呈持续性伴恶心、呕吐。查体:体温37.8℃,麦氏点有固定压痛,反跳痛。拟经麦氏切口手术治疗。已完成术前准备,张先生仰卧于手术台上。要求:请用碘伏为患者进行手术区域皮肤消毒,并铺手术巾、手术单。