Tell me please if the following sentence is correct.
My teacher is constantly nitpicking at me.
I have looked up the verb nitpick in a few dictionaries and what I saw is that nitpick is used with the preposition about, but then there must be a thing or some kind of work that people nitpick about. For example:
My boss was nitpicking about the work I had done.
So is it possible to say nitpick at someone meaning finding fault with someone?