Ⅰ.阅读理解
There is some unwelcome news for students preparing for exams and officers putting in long hours—you don't need the break as much as you may think that makes you feel less tired.
Scientists have long assumed that willpower (意志力) is a limited resource，which is why you feel the need to have a rest，have a snack and come back to a task when you're feeling better.They argued that the only way to restore willpower was by rest，food or entertainment.
