a sane policy的用法和样例：
- He has a diseased body but a sane mind.
- She has a sane attitude towards diving and never go too fast.
- A sane mind. To start with? Would it stay that way?
- She seemed a sane, well-balanced sort of person.
- Show me a sane man, and I will cure him for you.
- I don't think a sane person would drive as dangerously as he did.