题目内容：
"It's 53. a myth that older people need less sleep. The more healthy an older adult is, the more they sleep like they did when they were 54. . Our data suggests that older adults would benefit from 55 to get as much sleep as they did in their 30s. That's 56. from person to person, but the amount of sleep we had at 35 is probably the same amount we need at 75."参考答案：