OMG. You are 164cm and 48kg? No need to cut any weight already babe. Cut somemore and you will be blown away by the wind! IMO I think you're perfectly ok now. No need to lose more weight! Don't be too skinny. :(
I used to be 39kg - 43kg at 160++ height! R/s really makes people gain weight :( I aim 45 - 46kg okay =D