worrywart

Obviously, being a worrywart isn't always a bad thing.

显而易见，成为一个杞人忧天的人并不见得就是一件坏事。

EXAMPLE: My cousin is a worrywart who never enjoys vacations because he's always imagining possible disasters that may occur while he's away from his job.

我的堂兄弟经常杞人忧天，从来没有好好度过假，因为他总在想象，他脱手工作后可能出什么大问题。

In Apple's sales pitch to worrywart shareholders, that is the wrong sort of iPhone endurance.

在苹果对忧心忡忡的股东的宣传中，iPhone的这种耐久可不是好事。

Don't a worrywart. A little shaking won't knock down this house.

别那麽杞人忧天嘛,一点小小的摇晃不会把房子震垮的.

Such a person is often said to be a worry wart, also rendered as worrywart or worry-wart in some literary references.

这种极度忧虑的人就被称为是“杞人忧天”（拼写为worry wart、worrywart或worry-wart都可以）。

I have a healthy concern for what my boss and my co-workers think, but I don't think I'm a worrywart.

我才不信呢.你自己不也老是担心工作，老是担心你的老板和同事对你印象不好啊。

Don't listen to him& he's just an old worrywart.

别听他的&他只不过是庸人自扰。