男性,55岁,进行性吞咽困难2个月,体重下降5kg,体检无异常。其治疗方法首选() ["A.手术","放疗","化疗","内镜下扩张","内镜下支架置入"]
成人胸外心脏按压,一般使胸骨下陷的深度为() ["1~2cm","2~3cm","3~4cm","4~5cm","5~6cm"]
患者女,35岁。发现右乳包块1个月,查体右乳外上一约2.5cm包块,质硬,腋窝未触及肿大淋巴结。如患者行象限切除加腋窝清扫,术后病理为浸润性小叶癌,2.5×2cm大小,ER,PR均阴性,术后应采用()。 ["A.放疗","内分泌治疗","化疗","介入治疗","免疫治疗","生物治疗"]
伤寒最严重的并发症是() ["肠出血","中毒性心肌炎","溶血尿毒综合征","中毒性肝炎","肠穿孔"]
脑复苏过程中防止脑水肿最重要的措施是() ["输血","输高渗溶液","头部低温与脱水疗法","吸入高浓度氧","输碳酸氢钠溶液"]
基本力是大气与地球或大气之间的相互作用而产生的真实力,它们的存在与参考系无关,基本力包括:()、()、()。