题目：
The primary reason for withholding food and fluids from a client who will receive general anesthesia is to help prevent
A．constipation during the immediate postoperative period.
B．vomiting and possible aspiration of vomitus during surgery.
C．pressure on the diaphragm with poor lung expansion during surgery.
D．gas pains and distention during the immediate postoperative period.
答案：
参考答案：B
解析：Oral food and fluids are withheld before surgery when a client receives general anesthesia primarily to help prevent vomiting and possible aspiration of stomach contents.
