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Exercise, any kind
You can run, lift weights, do yoga, take classes—there are tons of options. Any exercise is better than none, and if you're feeling out of shape, try doing a little more than whatever you're currently doing. A healthy week's worth of exercise should include some cardio and some strength training.
You might be a runner who gets in a few strength sessions, or a lifter who hops on the rower for a little cardio once or twice a week. Or maybe you play a sport that gives you a good mix of both in every practice.
If you're new to everything, explore until you find something you love. Then find a program, team, coach, or long-term goal to structure the rest of your training.
Sleep enough
There are entire industries that sell things to people who don’t have enough energy. You could buy their vitamins, gadgets, or motivational advice...or you could just get enough sleep in the first place.
If you routinely get six hours or less, fixing that will probably solve a huge number of what might otherwise seem like health or energy related problems. Most people need between six and nine hours. The way to get more sleep is usually just to rearrange your morning and evening schedules to allow yourself enough time in the sack.
Eat a non-crappy diet
There are many healthy ways to eat, so don't worry too much about whether you've found the optimal one. All of the healthy diets involve lots of fruits and vegetables, and not too much sugar.
If you're trying to lose weight, know that all of the diets and fasting schemes out there work the same way: they result in you reducing your calorie intake. Beyond that, they each have their own pros and cons: you might feel more full and satisfied on the high-fat content of the keto diet, or you might prefer the simplicity of intermittent fasting, or maybe you enjoy a lot of the foods you can eat on an old-school low-fat diet.

1.How long do most people need to sleep?

A Less than 6 hours.

B 6 to 9 hours.

C More than 6 hours.

D More than 9 hours.

解析：选B。细节理解题。根据第五段Most people need between six and nine hours.可知，大多数人需要睡6至9小时，故选B。

2.What’s the Chinese meaning of the underlined word “optimal”？

A 喜欢的.

B 最佳的.

C 欢快的.

D 糟糕的.

解析：选B。词义猜测题。健康的饮食方式多种多样，所以无需过于担心是否找到了“最佳”饮食，下文对此有阐述，optimal意为“最佳的”，故选B。

3.Which of the following is NOT true according to the passage?

A A healthy week’s worth of exercise only include some cardio.

B If you're feeling out of shape, try doing a little more than whatever you're currently doing.

C All of the healthy diets involve lots of fruits and vegetables, and not too much sugar.

D If you're trying to lose weight, you might prefer the simplicity of intermittent fasting.

解析：选A。细节理解题。根据第一段A healthy week's worth of exercise should include some cardio and some strength training.可知，健康的一周应包括有氧运动和力量训练，故选A。

4.What we can know from this passage?

A It is not necessary to eat fruits and vegetables.

B It is nice to do some strength training every day.

C There is no need to rearrange morning and evening schedules.

D It is good for health to do sports, sheep enough and eat a non-crappy diet.

解析：选D。推理判断题。保持身体健康主要从运动、睡眠、健康饮食三个方面入手，故选D。