[名词解释] 持续劳累性损伤

肌张力 右前斜位吞钡检查，食管前缘见不到的压迹是() ["A．主动脉弓压迹","B．左主支气管压迹","C．肺动脉段压迹","D．左心房压迹","E．降主动脉压迹"] 挤压伤 挫伤 下述“少年结肠息肉”特点，错误的是() ["A．孤立性息肉发病率最高","B．孤立性息肉恶变率最高","C．6个以上息肉：少年结肠息肉病","D．居儿童结肠肿瘤发病首位","E．婴儿型发病率最低"] 持续劳累性损伤