正常组织最小耐受剂量是指（）

A.TD5／5

B.TD50／5

C.正常组织不发生并发症的剂量

D.正常组织发生5%并发症概率的剂量

E.以上都不对

My grandfather is too old to care for himself, so my aunt is looking for someone to _____ him.[ ]

A. treat  

B. cure  

C. attend

D. examine