意思不同,用法不同。
be anxious about 为 ... 而忧虑。
The moderates have plenty to be anxious about.
温和派有许多问题要担忧。
I don't wonder you were anxious about their safety.
你为他们的安全着急,我是不奇怪的。
be anxious at焦急。
With an extreme form of social anxiety called selective mutism, some kids and teens may be too anxious to talk at all in certain situations.
发展到社交恐惧症的极端形式&选择性不语症时,一些孩子和青少年在某些处境中可能紧张得根本说不出话来。