If two or more things are alike, they are similar in some way.
We looked very alike.
我们长得很相像。
Alike means in a similar way.
They even dressed alike.
他们甚至连穿着都相像。
The article makes the false assumption that all men and women think alike.
这篇文章做了一个错误的假设,认为所有男性和女性的思维方式都是相似的。
You use alike after mentioning two or more people, groups, or things in order to emphasize that you are referring to both or all of them.
The techniques are being used almost everywhere by big and small companies alike.
几乎所有地方的大小公司都在运用这些技术。