在表示对于的含义时for和to的区别

Question

A firm's public image plays a vital role in the attractiveness of the firm and it's products to employees,customers,and for such outsiders as stockholders,suppliers and so on.这里为什么对于雇员和消费者用的是to而对于持股者和供应商却用的是for呢，在表示“对于”这个含义时，for和to空间有什么区别？在线等？

Answer 1

有三种情况：
1. 必须用for
The book is good for us.
2. 必须用to:
He is very kind to us.
3. for和to均可：
It is important for/to us.
因句型、词组而异，具体情况具体分析