These natural disasters have warned us that everyone should start to protect the _____ immediately. [ ]

A. amusement

B. development

C. environment

D. government

对于诊断"脑炎后智力低下"，其主要编码是（）

A.脑炎

B.智力低下

C.脑炎后遗症

D.需要帮助和人员照顾

E.脑炎恢复期