The Healthy Habits Survey shows that only about one third of American seniors have correct habits. Here are some findings and expert advice.

    Mountaineers have noted that as they climb, for example, up to the 12,633­foot Humphreys Peak in Arizona, plant life changes greatly. In the Sonoran Desert, one climbs into a pine forest at 7,000 feet and a treeless tundra(冻土带) on the top of the mountain. It may seem that plants at a given altitude are associated in what can be called “communities” －groupings of species. The idea is that over time, plants that require particular climate and soil conditions come to live in the same places, and are frequently to be found together. Scientists study the history of plant life and build up a picture of how groups of plants have responded to climate changes and how ecosystems develop. But are these associations, which are real in the present, permanent?

    A great natural experiment took place on this planet between 25,000 and 10,000 years ago, when small changes in the earth's orbit caused great sheets of ice to spread from poles. These glaciers(冰川) covered much of North America and Europe to depths of up to two miles, and then, as the climate warmed, they retreated. During this retreat, they left behind newly uncovered land for living things to occupy, and as those living things moved in they laid down a record we can read now. As the ice retreated and plants started to grow near a lake, they release pollen(花粉). Some would fall into the lake, sink to the bottom and mix with the sand. By drilling into the lake bottom it is possible to read the record of the plant life around the lake. The fossil record seems clear; there is little or no evidence that entire groups of plants moved north together. Things that lived together in the past don't live together now, and things that live together now didn't live together in the past. Each individual living things moved at its own pace. The fossil record seems to be telling us that we should be thinking about preserving species by giving them room to move about－to respond to environmental changes.

    In Western countries, bread is one of the most important foods. When they get up in the morning many people eat toast (烤面包). They spread butter and jam on their toast. People eat bread at other times of the day too. For example, at main meals, they often eat bread with soup.

    It's also very common to eat sandwiches. A sandwich is two pieces of bread with a filling inside - salad, cheese or fish. A hamburger is a kind of sandwich.

There are many different kinds of bread. Some are special to some countries. For example, the baguette (法国棍子面包) is a long, thin loaf that began in France.

    There is also white bread and whole-wheat (全麦面) bread. What's the difference? White bread is refined (精制的). It has things taken out of it to make it softer and easier to eat. The trouble is, white bread also has lots of goodness taken out. Although some people dislike the taste of whole-wheat bread, it is much healthier.

    Some kinds of bread have additives (添加剂). They are put into the bread for many reasons. Some additives are good for you - for example vitamin C. Others are there to make the bread last longer. Still others to make it taste better - but they do not necessarily make the bread healthier to eat!

    When I was going home to India last year, I called up my mother to ask if she wanted anything from China.

    When India had not opened up its markets to the world, I carried suitcase loads of dark glasses and jeans. Thankfully, we can get all these anywhere in India now.

    Still, her answer surprised me, “Green tea.”

    As long as I can remember she didn't even drink Indian tea.

    I dutifully bought a big packet of Longjing and headed home to hear the story. My mother and her brother, both regular newspaper readers, believed that Chinese green tea was the wonder drug for all illnesses.

    At the turn of the century，China was not really familiar to the average Indians. It was a strange country.

    How things change! And how soon!

    Now every town of any size seems to have a “China Market”. And everyone is talking about China.

    The government of India has planned to send a team to China to see how things are done. A minister once said that India must open the doors for more foreign investments(投资) and such a step would “work wonders as it did for China”．

    But it's a two way street. I just heard about a thousand Shenzhen office workers who have gone to Bangalore to train in software. Meanwhile, all the Indian IT majors are setting up a strong presence in China.

    No wonder that trade, which was only in the millions just ten years ago，was expected to hit about $15 billion for last year and $20 billion by 2008, a goal set by both governments.

    No wonder，my colleague wrote some weeks ago about this being the Sino－Indian(中印) century as the two countries started on January 1 the Sino－Indian Friendship Year.

    But what is still a wonder to me is my mother drinking Chinese tea.

    Mother's Day is a time of memory and celebration for Mom. The earliest Mother's Day celebrations date back to ancient Greece in honour of Rhea, the Mother of Gods. During the 1600s, England celebrated a day called “mothering Sunday”. Celebrated on the fourth Sunday of Lent(四旬斋)，“mothering Sunday” honoured the mothers England.

    During the time many of the England's poor worked as servants for the wealthy.AS most jobs were located far from their homes, the servants would live at the houses of their employers. On Mothering Sunday, the servants would have the day off and were encouraged to return home and spend the day with their mothers. A special cake, called the mothering cake, was often brought along.

As Christianity(基督教) spread throughout Europe, the celebration changed to honour the “Mother Church”—the spiritual power that gave them life and protected them from harm. Over time the church festival combined with mothering Sunday celebration. People began honouring their mothers as well as the church.

    In the United States Mother's Day was first suggested in 1872 by Julia Ward Howe as a day devoted to peace. Then in 1907 Ana Jarvis, from Philadelphia, began a campaign(运动) to establish a national Mother's Day. Ms Jarvis persuaded her mother's church in Grafton, Virginia to celebrate Mother's Day on the second anniversary of her mother's death, the 2nd day Sunday of May. By the next year Mother's Day was also celebrated in Philadelphia.

    Ms Jarvis and her supporters began to write to ministers, businessmen, and politicians demanding to establish a national Mother's Day. It was successful as by 1911 Mother's Day was celebrated in almost every state. President Woodrow Wilson, in 1914, made the official announcement that Mother's Day was a national holiday and it was to be held each year on the 2nd Sunday of May.

    While many countries of the world celebrate their own Mother's Day at different times throughout the year, there are some countries such as Denmark, Finland, Italy, Turkey, Australia, and Belgium which also celebrate Mother's Day on the 2nd Sunday of May.

    The movie The Wizard of Oz has thousands of fans around the world. But back in 1939 when the film opened, audiences were not particularly fond of it. It was only a modest box office success. It was nominated for Best Picture at that year's Academy Awards, but so were nine other great films. It lost out to Gone with the Wind.

    The Wizard of Oz really gained an audience when it was broadcast regularly on TV. That began in the 1950s. The film's plot follows young Dorothy who is knocked unconscious during a tornado. She dreams about following a Yellow Brick Road through the Land of Oz to the Emerald City. She wants to meet the Wizard of Oz who lives there. He's the only one who can help her to return home to Kansas. Along the way she makes friends with the Scarecrow, the Tin Man and the Cowardly Lion. They help her and her dog Toto overcome the Wicked Witch of the West!

    According to the Library of Congress, The Wizard of Oz is the most watched movie of all time. What is it about the film that appeals to people? It includes themes that people can relate to. Through most of the movie Dorothy is trying to get home to Kansas. When she finally gets to go, she speaks the words, "there's no place like home." People identify with that thought. Home is the welcoming place where they feel secure.

    At the beginning of the film, Dorothy sings of a place "over the rainbow." There, the dreams that you dare to dream really do come true. So while home is a great place, dreaming about something different is all right too.

    The Wizard of Oz also deals with courage. Dorothy learns that true courage isn't being unafraid. It's facing danger when you are afraid. Her friends face plenty of danger to rescue her.

    As one of the true classics of American literature, The Wizard of Oz has stirred the imagination of young and old alike for over four generations. Celebrate the 80th year of this fabulous film by watching it again.