be good at 和do well in的区别

一个是擅长于，第二个是在……方面做得好

be good at 是擅长
do well in是成绩好，在。。。方面做得好

be good at 和 do well in区别
be good at v.擅长
do well in在……成绩好,在...做得好,在……表现好
现以例子来说明它们意思的区别：
You are good at English你英语好,你擅长英语.
You do well in English你英语成绩好（英语成绩好,并不表示你的英语就很好了,比如你在学小学一年级的英语时很刻苦,成绩好,但尽管你的成绩很好,但你不能说你英语就很好了,你不能说你你擅长英语,毕竟你学的只是小学一年级的英语,另外,说不定会半途而废呢,说不定你小学二年级英语成绩很差呢.）
请再多看些例子来体会他们意思上的区别
Peanuts do well in this area.
这一带花生长得很好.
She was resolved to do well in the factory.
她决心在厂里好好干.
The scheme will do well enough in good hands.
在能人手里,这计划实施起来一定很不错.
Well,steven is not doing well in his second vault.
唉,斯芬在第二次（撑竿）试跳时没有跳好.
Be you any good at business?
你做生意行吗?
a good executive must be good at decision making.
优秀的领导者必须善于决策.
Such good chance shouldn't be sniffed at.
这样好的机会你决不可小看.
The boy used to be no good at arithmetic.
过去那男孩算术总是不行.
The important thing is to be good at learning.
重要的是善于学习.
We should be good at learning from each other.
我们应该善于互相学习.
We should be good at separating friends and foes.
我们要善于区分敌友.