题目：
The nurse is caring for a client admitted to the hospital with a bowel obstruction. The nurse should wear sterile gloves when
A. inserting an indwelling urinary catheter.
B. giving a back rub on intact skin.
C. changing an oxygen system.
D. inserting an IV catheter.
答案：
参考答案：A
解析：Inserting an indwelling urinary catheter is the only sterile procedure listed here. Gloves aren’t necessary when giving a back rub on intact skin or when changing an oxygen system. Nonsterile gloves would be worn when inserting an IV catheter.
