you look very tired.------- at all last night?No,not really.

You look very tired.Didn't you sleep at all last night?No,not really.i'm tired out now.因为句中有at all 所以我确认did应该是否定的.如果去掉at all的话此句应该是这样的You look very tired.Did you sleep well last night?No,not really.i'm tired out now.