我的朋友对于在网上分享个人细节很谨慎。

My friend is ___cautious about sharing personal details online.

一个成功的投资者通常采取谨慎的策略。

A successful investor often has a ___cautious strategy.

在经济不确定的时期，对大额消费保持谨慎是明智的。

In uncertain economic times, it's wise to be ___cautious with major purchases.