医生给的减肥食谱，该什么时候吃呢？
Mrs King is about forty years old. She likes to eat meat and cakes very much. She doesn’t like sports. She always gets up at about eleven in the morning. So she gets fatter and fatter. Now it’s difficult for her even to walk.
One day, she went to see a doctor. The doctor looked over her and then said, “There is something wrong with your heart, Mrs King. It’s bad for you to eat too much sugar and meat. You’d better eat a piece of bread for each meal.”
“That’s easy, doctor,” said Mrs King. “But when should I eat it? Before a meal or after a meal?”