The client asks when he can stop taking the eye medication for his chronic open-angle glaucom().

A. Which would be the nurse’s best responseA. "You can stop using the eye drops when your vision improves. "

B. "You Need to use the eye drops only when you has symptoms. "

C. "You can discontinue the eye drops after 2 months of normal eye examinations. "

D. "You must use the eye medication for the rest of his life. "

（4分）利用盖斯定律回答下列问题：

已知热化学方程式

C（s、金刚石）+O₂(g) —→ CO₂(g); △H=-395.4kJ·mol^—1

C（s、石墨）+O₂(g) —→ CO₂(g)； △H = -393.5kJ·mol^—1

由金刚石转化为石墨的热化学方程式为              ，由热化学反应方程式看来，更稳定的碳的同素异形体是          。