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 perio

预制阳台采用预留吊环形式，需在预制阳台内预埋（）个吊环。

A.2

B.3

C.4

D.6