化学治疗用药护理下列正确的一项为

A．药物仔细核对并配好后以备用

B．注意保护静脉，从远端开始穿刺

C．一旦发现外漏立即热敷促进吸收

D．用化学治疗药物直接穿刺，穿刺应准确

E．化学治疗药物均用5%葡萄糖溶解、稀释

Mr. Zhang has retired already. He       in our school for over thirty years.

A．has worked

B．had worked

C．worked

D．was working