used for emphasis when you are saying or asking whether something is even slightly true, especially after words such as ‘any', ‘anything', ‘anyone', or ‘nothing' 一点都(尤与any, anything, anyone, nothing 等词连用)
Has the situation improved at all? 局势有点好转了吗?
You don't have any money at all? 你一点钱都没有吗?
He doesn't know anything at all about computers. 他对计算机一窍不通。