Hi，I usually tell my students if they are thanked by others they can respond by phrases like" You are welcome/. Not at all./ My pleasure./Don't mention it.etc." but one of my student told me when he was in Eastern America, heoften heard people say"Absolutely" when they are thanked.Is it appropriate? I feel it 's not polite. and can I use" it's ok" to respond to thanks since I read from books people do say " it's all right", these two phrases seem to mean the same in my opinion. Thanks a lot.