题目内容：

Ways to Strengthen Your Brainpower

Want a healthier, sharper brain? It’s easier than you think to achieve improved cognition (认知) and memory. Try these simple tips to power up your brain!

1. Play ping-pong.

1. Researchers have found that in players older than 50, ping-pong improves brain health by activating specific neurons (神经元), and shows promise in preventing dementia (an illness that affects the brain and memory, and makes you gradually lose the ability to think and behave normally).

2. Close your eyes.

Research has found that closing your eyes while recalling an event could help you remember details 23 percent more accurately.2. It’s thought that once visual distractions are removed, your brain focuses more efficiently.

3. Shake your body.

Anew study has found that regular aerobic (有氧的) exercise can actually increase the size of your hippocampus — the part of your brain that helps you learn and remember.3.

4. Find your sleep sweet spot.

Getting a good night’s sleep is the best thing you can do for your brain long term.4. The National Sleep Foundation recommends seven to nine hours of shut-eye per night for adults ages 18 to 64, and seven to eight hours for adults 65 and older.

5.5.

Make a point to regularly ask yourself, “What if everything went right instead of wrong?” Positive thinking can actually activate your brain’s physical ability to adapt and change. Former President Jimmy Carter, 91, who responded to his recent cancer diagnosis with “optimism and determination,” is a great example of this.

A. How does it work?

B. Look on the bright side.

C. Hang out with friends and family.

D. It improves your mood and clears out your mind.

E. So whether it’s dancing, jumping or running, it’s good for your brain.

F. If you want to sharpen your brain, you have to focus your attention on yourself.

G. Table tennis has long been praised for its ability to improve attention and concentration.