Lena was a bit overwheight when she went for her annual doctor’s visit. The doctor told her, “I want you to eat regularly for two days then skip a day, then repeat this procedure for two times a week. The next time I see you, you’ll have lost at least five pounds.”When Lena returned, she’d lost nearly 20 pounds.“Why, Lena, that’s amazing!” the doctor said. “Did y...
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