It's a positive answer using the present perfect from the question.

这是一个肯定的回答，使用问题的现在完成时。

The following passage provides a positive answer: by simply choosing optimism, we can lead a better life.

我们可以选择乐观的生活态度来让生活变得更美好。

When you ask a question like this, you're pushing them to give you a positive answer and say yes.

当你问这样的问题时，你是在敦促他们给你一个肯定的答案并说是。