This idiom satirizes those who worry unnecessarily.

“杞人忧天”这个成语讥笑那些没有必要或毫无根据的忧虑。

youdao

However, the research also uncovered evidence that many young females, aged 16 ~ 24, worry unnecessarily about their weight.

不过，调查也发现很多16岁至24岁不等的年轻女子不必要地为她们的体重担心。

youdao

If an important action is not on your list, you'll worry about it unnecessarily.

如果一件重要的活动不在你的清单中，你将为此增添不必要的烦恼。

youdao

And we now need to make sure that all of these folks understand what the protections are so that they don't unnecessarily worry about a risk that they no longer face.

NPR: Senate OKs Bill Outlawing Genetic Discrimination