— What's the best way to _____ the disease caused by biting insects?

— Ah, don't bite any! [ ]

A. protect

B. prevent

C. keep

D. kill

慢性结膜炎常见的临床症状为()

A．轻度的结膜充血

B．少量的粘性分泌物

C．发痒

D．异物感

E．眼疲劳