鼻咽腔位于() ["A．上咽部","B．中咽部","C．下咽部","D．鼻腔后1/3处","E．上咽部和中咽部之间"]
试述下消化道出血的病因。
鼻咽癌早期最常见的侵犯部位是() ["A．鼻咽前壁","B．鼻咽后壁","C．鼻咽顶壁","D．咽隐窝","E．耳咽管开口"]
手2～5指伸肌腱Ⅲ和Ⅳ区损伤后的康复治疗() ["A．术后1～6周，远侧指间关节夹板固定于伸直位，近侧指间关节自由屈伸","B．术后1～6周，近侧指间关节夹板固定于伸直位，远侧指间关节自由屈伸","C．术后1～6周，远、近侧指间关节夹板固定于伸直位","D．术后1～6周，掌指关节固定于半直位，近、远侧指间关节自由屈伸","E．以上均不是"]
下列组合，错误的是() ["A．听眶线——与听眦线约呈20°角","B．听眦线——与听眶线约呈12°角","C．听鼻线——与听眦线约呈25°角","D．听口线——与听眦线约呈35°角","E．听眉线——与听眦线约呈10°角"]
如何估计消化道出血的程度?
