胃扭转()先天性肥厚性幽门狭窄()幽门痉挛() ["A．喷射样呕吐，可见胃型并摸到橄榄样肿块","B．生后即出现呕吐，喷射性，不含胆汁，无橄榄样肿块","C．生后即出现不规则呕吐，不含胆汁，无橄榄样肿块，阿托品治疗有效","D．生后出现呕吐，不舍胆汁，无橄榄样肿块，喂稠奶，采用俯卧位有效","E．生后出现呕吐，不含胆汁，X线检查胃大弯位于小弯之上"]
CT平扫，常呈等密度表现的病变为() ["A．血管瘤","B．肝内胆管结石","C．肝脓肿","D．局灶性结节增生","E．肝腺瘤"]
关于转移性肝癌，下列描述哪项是错误的() ["A．腺癌和内分泌肿瘤的转移，易坏死","B．原发瘤多位于消化道","C．少有合并肝硬化者","D．门脉主干常有癌栓","E．其肝动脉供血量常不及原发性肝癌"]
多血供性肝转移者，原发灶常为() ["A．肺癌","B．胃腺癌","C．结肠癌","D．肾癌","E．乳腺癌"]
CT平扫，肝脏密度一致性减低，最可能的诊断是() ["A．血色病","B．肝脓肿","C．弥漫性肝癌","D．肝淋巴瘤","E．脂肪肝"]
食管裂孔疝()肠套叠()梅克尔憩室()NEC()
