伤后由烦躁进入昏迷，并出现一侧瞳孔散大，光反射消失（）

A．原发性脑干损伤，损伤位于中脑 

B．原发性脑干损伤，损伤位于脑桥 

C．原发性动眼神经损伤 

D．原发性视神经损伤 

E．幕上血肿致脑疝形成

More than 30 years ago, （）that the region was rich in natural resources。

A.people did littleknow

B.people little know

C.littledidknow

D.little did people know