患者,男,36岁。因大叶性肺炎遵医嘱予以青霉素注射治疗。注射前询问得知,患者以前从未用过青霉素,则为患者做青霉素过敏试验后应观察()分钟。
A. 5分钟
B. 10分钟
C. 15分钟
D. 20分钟
E. 30分钟
静脉留置针的进针角度是
A. 15°~30°
B. 20°~30°
C. 45°
D. 30°~40°
E. 5°
What is the greatest disadvantage of “giving and receiving” system?
What is the reason for the proposal of publicly honoring organ donors?