A 7-year-old boy is hospitalized with cystic fibrosis. To help him manage secretions and avoid respiratory distress, the nurse should

A. perform chest physiotherapy every 4 hours.
B. give pancreatic enzymes as ordered.
C. place the child in an oxygen tent and have oxygen administered continuously.
D. serve a high-calorie diet.

护墙板、筒子板与贴脸板安装后应刷一道底漆，以防干裂或污染。