injection quadrant

例句：

1. 1.The doctor injected the patient with a painkiller.
   医生给病人注射了止痛药。
2. 2. The nurse carefully monitored the patient's vital signs in the injection quadrant.
   护士仔细监测了病人在注射区的体征。
3. 3. The research team focused on studyingthe effects of different injection quadrants on the immune system.
   研究团队专注于研究不同注射区对免疫系统的影响。