尽管我一再保证这个手术很安全，他依然很焦虑。

Despite my ___reassurance that the procedure was safe, he remained anxious.

我非常喜欢与人相处，并且需要被他人喜爱的安心感。

I very much like being around people and need the ___reassurance of being well liked.

经过彻底检查后，机械师让我放心，说这辆车的状况非常好。

After a thorough inspection, the mechanic offered the ___reassurance that the car was in perfect condition.