case,occasion,point 属于抽象地点，作为
先行词，后面是where引导的
定语从句，不是状语从。
请你看看下边讲解
先行词是抽象地点
有一些先行词，如point, stage, position, case, policy, condition等，属于抽象的地点名词，需要接where引导的定语从句。
There is one point where I’d like your advice.
有一点，我想听听你的建议。
A condition where the parking brakes do not hold will most probably be due to a wheel brake component.
不能按住手煞车的情况最大的可能是由于车轮煞车部件的原因。
You reach a point in your project where you just want to get the thing finished.
从事任何项目你都会进入一种境界：一心想完成它。
I’ve reached the stage where I just don’t care any more.
我已经到了一种什么都不在乎的地步。
We are in a position where we may lose a large sum of money.
在我们的处境下可能会损失打量金钱。
There are cases where this rule does not hold good.
在一些情况下，这个规则是不适用的。
This company has now introduced a policy where pay rises are related to performance at work.
这家公司引进一种政策：薪酬与工作表现挂钩。
Have you ever been in a situation where you know the other person is right yet you cannot agree with him?
你是否曾经处于你知道另一个人和你格格不入的一种境况？