[问答题,简答题] 试述类风湿性关节炎的X线表现。

食管癌X线表现为() ["A．管腔狭窄","B．粘膜皱襞中断","C．腔内充盈缺损","D．不规则龛影","E．以上都是"] 类风湿性关节炎的主要症状有哪些? 绞窄性小肠梗阻常见原因是() ["A．肠内疝","B．肠扭转","C．肠套叠","D．肠粘连","E．以上都是"] 试述骨关节炎病人的治疗原则。 腹部立位片空肠扩张可见() ["A．环形皱襞较多","B．半月状皱襞","C．上腹或上中腹偏右","D．中下腹或下腹偏右","E．环形皱襞较少"] 试述类风湿性关节炎的X线表现。