题目保留灌肠时,肛管插入肛门长度约()A. 7-10cmB. 15-20cmC. 21-24cmD. 10-14cmE. 12-14cm保留灌肠时,肛管插入肛门长度约()A. 7-10cmB. 15-20cmC. 21-24cmD. 10-14cmE. 12-14cm题目解答答案B. 15-20cm