【英语】—The dress is perfect on you.

【英语】—The dress is perfect on you.
—The dress is perfect on you.
—Thank you.You know,I'm already in my late thirties.
—Really?You don't _______ at all!
A.look like so
B.look like yourself
C.like
D.look it
说明理由.
look like so中的so为什么就不能表示“in my late thirties”呢？