“Have a nice day!” may be a pleasant gesture or a meaningless expression. When my friend Maxie says “Have a nice day!” with a smile, I know she sincerely cares about what happens to me. I feel loved and secure since another person cares about me and wishes me well.

    “Have a nice day. Next!” This version(版本) of the expression is spoken by a salesgirl at the supermarket who is rushing me and my groceries out the door. The words come out in the same tone with a fixed procedure. They are spoken at me, not to me. Obviously, the concern for my day and everyone else's is the management's attempt to increase business.

    The expression is one of those behaviors that help people get along with each other. Sometimes it indicates the end of a meeting. As soon as you hear it, you know the meeting is at an end. Sometimes the expression saves us when we don't know what to say. “Oh, you just had a tooth out? I'm terribly sorry, but have a nice day.”

    The expression can be pleasant. If a stranger says “Have a nice day” to you, you may find it heart-warming because someone you don't know has tried to be nice to you.

    Although the use of the expression is an insincere, meaningless social custom at times, there is nothing wrong with the sentence except that others who speak it without thinking may not really care about my day. But in a strange and comfortable way, it's nice to know they care enough to pretend they care when they really don't care all that much. While the expression may not often be sincere, it is always spoken. The point is that people say it all the time when they like.

    Will it matter if you don't take your breakfast? Recently a test was given in the United States. Those tested included people of different ages, from 12 to 83. During the experiment, these people were given all kinds of breakfasts, and sometimes they got no breakfast at all. Special tests were set up to see how well their bodies worked when they had eaten a certain kind of breakfast. The results show that if a person eats a proper breakfast, he or she will work with better effect than if he or she has no breakfast. This fact appears to be especially true if a person works with his brains. If a student eats fruit, eggs, bread and milk before going to school, he will learn more quickly and listen with more attention to class.

    Opposite to what many people believe, if you don't eat breakfast, you will not lose weight. This is because people become so hungry at noon that they eat too much for lunch, and end up gaining weight instead of losing. You will probably lose more weight if you reduce your other meals.

    Who is the greatest teacher in Chinese history? Many people would think of Confucius, whose birthday was September 28. Although he lived over 2,000 years ago, people still remember and respect him for his contribution to the education today.

    Confucius lived in the Kingdom of Lu, which lies in Shandong Province. He lived during the Spring and Autumn Period. He had a hard childhood. His father died when he was only 3. His mother brought him up. As a child, he had to work to help his mother, but young Confucius didn't give up studying. He visited many famous teachers and learned music, history, poetry and sports.

    Later, he became a teacher and started the first public school in Chinese history. At that time only children from noble families could go to school, but Confucius believed everyone should go to school if they wanted to learn. He had about 3,000 students in his lifetime.

    Today, people still follow Confucius' lessons. He told us that we all have something worthy to be learned. “When I am with three people, one of them must be better than me in some areas. I choose their good qualities and follow them.”

    He also taught us that thinking is very important in study. “All study but no thinking makes people puzzled. All thinking but no study makes people lazy.”

    Confucius is not only a great teacher, but also a famous thinker with wise thoughts about the world and society. His most important teachings are about kindness and good manners. “A person should be strict with himself, but be kind to others.” he said.

    One early morning, I went into the living room to find my mother reading a thick book called Best Loved Poems to Read Again and Again. My interest was aroused only by the fact that the word "Poems" appeared in big, hot pink letters.

    "Is it good?" I asked her. "Yeah," she answered. "There's one I really like and you'll like it, too." I leaned forward." 'Patty Poem,'" she read the title. Who is Patty? I wondered. The poem began:

    She never puts her toys away,

    Just leaves them scattered ⁽散乱的)where they lay,...

    The poem was just three short sections. The final one came quickly:

    When she grows and gathers(稳重的)poise,

    I'll miss her harum-scarum(莽撞的) noise,

    And look in vain for scattered(徒劳地)toys.

    And I'll be sad.

    A terrible sorrow washed over me. Whoever Patty was, she was a mean girl. Then, the shock.

    "It's you, honey," My mother said sadly.

    To my mother, the poem conveyed a parent's affection when her child grows up and leaves. To me, the "she" in the poem was horror. It was my mama who would be sad. It was so terrible. I burst out crying.

    "What's wrong?" my mother asked.

    "Oh Mama," I cried. "I don't want to grow up ever!"

She smiled. "Honey, it's okay. You're not growing up anytime soon. And when you do, I'll still love you, okay?"

    I calmed down. But I could not help thinking about that silly poem. After several years, I read the poem again and was confused. It all fit so well together, like a simple puzzle easy to understand, yet it was still beautiful. I was now attracted by the idea of poetry, words that had the power to make or break a person's world.

    I have since fallen in love with other poems, but "Patty Poem" remains my poem. After all, "Patty Poem" gave me my love for poetry.

    On a recent trip to the island of Newfoundland, Canada, my husband asked our talkative cab driver what made him most proud to be a native.

    "Our generosity and hospitality (好客)" he replied in a strong local accent. "If your car breaks down in the middle of nowhere, someone will stop to help. People here are kind like that." His answer rang in my mind during that ride with my husband and teenage kids, as we headed out to explore on the first day of our vacation.

    Little did I know we were about to experience some of that remarkable Newfoundland kindness for ourselves. We met Alma that same morning at the start of a long hike. Our teenagers hurried ahead, and as we walked behind, admiring the scenery, two women in sunglasses and summer hiking equipment stopped. They'd heard us discussing different routes, and then asked if we'd like suggestions. They looked to be in their 40s, and were both enthusiastic to share their local expertise.

    We listened eagerly, taking mental notes, until one of the women asked, "You have a car, right?" I explained that there were no cars available during our week on the island, so we had to rely on cabs instead.

    "Oh no," she said, "you need a car." And then, as casually as if offering a piece of chewing gum (口香糖), she said, "Take mine!" My husband and I just smiled in disbelief, dumbfounded.

    "Why not?" she insisted. "You need a car to get to know all these places."

    "But you don't even know us," I said.

    "That doesn't matter," she continued with absolute determination.

    Surprised, I looked over at her friend, who shrugged and said, "That's Alma."

    Forty minutes of talking later, my family climbed into Alma's car. We spent the rest of our vacation discovering different areas of this beautiful island. But it wasn't the groups of whales we saw, or the vast areas of woodland, that made this place so memorable. Instead, it was the act of kindness from a complete stranger that made us realize how special Newfoundland really was.

    Next year, there's no doubt where we'll be taking our summer vacation. Who knows what act of kindness we'll meet then?

    In its early history, Chicago had floods frequently, especially in the spring, making the streets so muddy that people, horses, and carts got stuck. An old joke that was popular at the time went something like this: A man is stuck up to his waist in a muddy Chicago street. Asked if he needs help, he replies, "No, thanks. I've got a good horse under me."

    The city planner decided to build an underground drainage （排水） system, but there simply wasn't enough difference between the height of the ground level and the water level. The only two options were to lower the Chicago River or raise the city.

    An engineer named Ellis Chesbrough convinced the city that it had no choice but to build the pipes above ground and then cover them with dirt. This raised the level of the city's streets by as much as 12feet.

    This of course created a new problem: dirt practically buried the first floors of every building in Chicago. Building owners were faced with a choice: either change the first floors of their buildings into basements, and the second stories into main floors, or hoist the entire buildings to meet the new street level. Small wood-frame buildings could be lifted fairly easily. But what about large, heavy structures like Tremont Hotel, which was a six-story brick building?

    That's where George Pullman came in. He had developed some house-moving skills successfully. To lift a big structure like the Tremont Hotel, Pullman would place thousands of jackscrews (螺旋千斤顶) beneath the building's foundation. One man was assigned to operate each section of roughly 10jackscrews.At Pullman's signal each man tured his jackscrew the same amount at the same time, thereby raising the building slowly and evenly. Astonishingly, the Tremont Hotel stay open during the entire operation, and many of its guests didn't even notice anything was happening.

    Some people like to say that every problem has a solution. But in Chicago's early history, every engineering solution seemed to create a new problem. Now that Chicago's waste water was draining efficiently into the Chicago River, the city's next step was to clean the polluted river.