翻译句子

1. We will have to operate on his eyes.

2. They operate three factories and a huge warehouse.

3. What skills are needed to operate this machine?

4. Solar panels can only operate in sunlight.

根据《未成年人保护法》的规定，卫生部门应当对儿童实行（）制度，积极防治儿童常见病多发病，加强对传染病防治工作的监督管理和对托儿所幼儿园卫生保健的业务指导。

A.预防接种

B.专人护理

C.疾病预防

D.传染病防治