You need to specify details what happened ..

Picture you were the lady at HR, and someone stepped in reporting being beaten by a co-worker. What would be your first reaction?

"What happened? Why did she do it? Did you over-react? Can we resolve this quietly without getting the situation out of hand?" Those are very normal reaction.

所以樓下叫你別多說很耽誤事，HR什麽都不知道怎麽介入？你的目的不是打擊你的同事，而是解決問題。你應該講述你理解的事情起因，她有敵意，或者她情緒不穩，以前是否有類似情況 ... 如果和她當麵談你不comfortable，你也應該直接說。你更多的是詢問這種情況你該怎麽處理，而不是簡單"找老師告狀，要老師主持公道" ...