Keep off! Wet paint.
油漆未干，请勿靠近！
Keep off the subject of politics
勿谈政治。
I managed to stick to the diet and keep off sweet foods
我努力做到了只吃规定饮食，不沾甜食。
The local police had warned visitors to keep off the beach at night.
当地警方告诫游客不要在夜间去海滩。
The afflicted person should keep off solid foods and drink plenty of fluids.
病人不应吃固体食物而要多喝流质食物。