患儿9岁，近远中深龋洞，牙龈红肿，有一个0.5mm×0.5mm脓肿，扪诊有波动感，X线显示根分歧及近中根尖区大面积透影，根形成2／3，上方骨板消失，萌出2／3

如果病人再次复诊，治疗原则是（）

A.拔除、做间隙保持器

B.拔除、观察间隙

C.保留患牙做根管治疗

D.定期复查

E.氢氧化钙根充治疗维持乳牙功能

The president ___by most people in the country.[ ]

A. was highly thought of            

B. thought highly to    

C. was high thought of              

D. was thought highly to