Uncle Li and Uncle Wang are good friends. They live next to each other and their farms are both at the foot of the mountain. So they can help each other. But neither of them likes to use his head. They're both poor though they work hard. Most villagers have built new houses，but they still live in the low and broken houses. They never find out why.

    Once Uncle Li went to town to buy some medicine for his wife. In the town he heard the apples in a city were expensive. He told Uncle Wang about it as soon a she went back. They decided to carry some apples to the city. They borrowed some money from their friends and bought nearly 1, 000 kilograms of apples in the villages and carried them to the city on a tractor. Bad luck！A lot of apples have already been carried there when they arrived. A few days later they had to sell them at a low price. They felt unhappy and returned to their village.

    "I can't understand why we sustained（蒙受）losses in business while others always profit（盈利）. "Uncle Li asked one day.

    "The tractor was too small，"Uncle Wang said without thinking. "We'll carry more apples on a truck next time！"

    "I agree!" said Uncle Li. "How foolish we were!"

    I believe you all have seen Marvel movies before. But do you know who created those superheroes? It's Stan Lee, the father of Marvel. People of all ages love him.

    Stan Lee was born in America in 1922. His real name is Stanley Lieber but his pen name is much more famous. With the help of his uncle, Lee became an assistant* in Marvel in 1939. During that time, he was paid only 8 dollars a month. In 1941, his first work Captain America came out and later he became the main comic book writer and editor. He created more than 80% of Marvel's characters, such as Iron Man and Spiderman, so he became as well-known as those characters.

    Lee carefully designed the Marvel world so that we can see most of the superheroes in it together. And he even became a character in his stories and played a role of his comic book heroes.

    The following is what he once said, "I was embarrassed* before, because I thought I was just a comic book writer while other people were doing great things. But then I began to realize that entertainment is one of the most important things in people's lives. I feel that if you are able to entertain, you are doing a good thing. Without it, they might go off the deep end."

    Lee died in 2018 at the age of 95. Though he has left, his superheroes will keep living on.

    My father is seventy-five years old this year. But he looks very young. He looks like a sixty-year-old man. Now he can do everything all by himself. For example, he cooks, washes clothes, does the housework and so on.

    Every morning, my father goes out with a radio. He listens to the music or the news and goes to the park to play taijiquan. In the park, he talks and laughs with other old people. After coming back from the park, he begins to have breakfast and then he goes to the university (大学) for the old. He learns to draw there. In the afternoon, he plays on the computer for about one or two hours. After supper he watches TV and learns about the world. He goes to bed at about eight o'clock. He never stays up. He likes to share his ways of keeping healthy with others.

    Are you healthy? If not, what do you learn from my father's secret of keeping healthy?