hao about you?

可以用I'm fine来回答,fine在这里做形容词,译为"身体好的"
也可以用I'm well来回答,well在这里也是形容词,译为"身体好的"
想要继续反问别人可以用How about you?/What about you?或者And you?更为口语化.

Me too.
Me Neither.
Fine.Thank you.
I'd ....
I will...

是How about you

是how about you?吧

是你怎么样的意思

你咋样？

你呢？