Phrases like “tiger mom" and "helicopter parent” have made their way into everyday language. Many of us find ourselves drawn to the idea that with just a bit more parental hard work and effort, we might turn out children with bright futures. But is there anything wrong with a kind of“over parenting style”?

    Parental involvement has a long history of being studied. Many of the studies, conducted by Diana Baumrind, a famous psychologist at the University of California, Berkeley, have found that a good parent is the one who is involved and reacts to her child in a positive way, who sets high expectations but gives her child independence. These “authoritative parents”appear to hit the sweet spot of parental involvement and generally raise children who do better academically, psychologically and socially than children whose parents are not strict and less involved, or controlling and more involved. Why is this parenting style so successful?

    Authoritative parents actually help improve motivation in their children. Carol Dweck, a social psychologist at Stanford University, has done research that indicates why authoritative parents raise more motivated children. In a typical experiment, Dr. Dweck takes young children into a room and asks them to solve a simple puzzle. Most do so with little difficulty. Butthen Dr. Dweck tells some, but not all, of the kids how clever they are. As it turns out, the children who are not told they're smart are more motivated to solve increasingly difficult puzzles. They also show higher levels of confidence and show greater progress in puzzle-solving.

    As the experiment suggests, praising children's talents and abilities seems to shake their confidence. Dealing with more difficult puzzles carries the risk of losing one's status as “smart”. Dr. Dweck's work strongly supports that of Dr. Baumrind, who also found that reasonably supporting a child's independence and limiting interference (干涉) causes better academic and emotional results.

    The central task of growing up is to develop a sense of self that is independent and confident. If you treat your young child who is just learning to walk as if she can't walk, you reduce her confidence. Allowing children to make mistakes is one of the greatest challenges of parenting. It is easier when they are young. The potential mistakes carry greater risks, and part of being a parent is reducing risk for our children.

        Family structure is the core of any culture. A major function of the family is to socialize new members of a culture. As children are raised in a family setting, they learn to become members of the family as well as members of the larger culture. The family provides the model for all other relationships in society. Through theobservations and modeling of the behavior of other family members, children learnabout the family and society including the values of the culture. Familystructure and their inherent relationships and obligations are a major sourceof cultural difference.

        The family is the center of most traditional Asians' lives. Many people worry about their families' welfare,reputation, and honor. Asian families are often extended, including severalgenerations related by blood or marriage living in the same home. An Asianperson's misdeeds are not blamed just on the individual but also on the family—includingthe dead ancestors.

        Traditional Chinese, among many otherAsians, respect their elders and feel a deep sense of duty toward them.Children repay their parents' sacrifices by being successful and supportingthem in old age. This is accepted as a natural part of life in China. Incontrast, taking care of aged parents is often viewed as tremendous burden inthe United States, where aging and family support are not honored highly.

        The Vietnamese family consists of peoplecurrently alive as well as the spirits of the dead and of the as-yet unborn.Any decisions or actions are done from family considerations, not individualdesires. People's behavior is judged on whether it brings shame or pride to thefamily. Vietnamese children are trained to rely on their families, to honorelderly people, and to fear foreigners. Many Vietnamese think that theiractions in this life will influence their status in the next life.

        Fathers in traditional Japanese familiesare typically strict and distant. Japanese college students in one study saidthey would tell their fathers just about as much as they would tell a totalstranger. The emotional and communication barrier between children and fathersin Japan appears very strong after children have reached a certain age.

        Although there has been much talk about"family values" in the United States, the family is not a usual frameof reference for decisions in U.S. mainstream culture. Family connections arenot so important to most people. Dropping the names of wealthy or famous peoplethe family knows is done in the United States, but it is not viewed positively.More important is a person's own individual "track record" ofpersonal achievement.

       Thus, many cultural differences exist infamily structures and values. In some cultures, the family is the center oflife and the main frame of reference for decisions. In other cultures, theindividuals, not the family, is primary. In some cultures, the family'sreputation and honor depend on each person's actions; in other cultures,individuals can act without permanently affecting the family life. Somecultures value old people, while other cultures look down on them.

(Adapted from R. L. Oxford & R. C.Scarcella, "A Few Family Structures and Values Around the Globe")

    In the frozen continent of Antarctica scientists fear an alien invasion — not from outer space, but carried in people's pockets and bags.

    Seeds and plants accidentally brought to Antarctica by tourists and scientists may introduce alien plant species which could threaten the survival of native plants in the finely balanced ecosystem.

    “The people that were carrying the most had lots and lots of seeds. They really were real threats,” said Dana Bergstrom, from the Australian Antarctic Division.

    “When we take things in through hitchhiking（搭车旅行） then we get species which are competitive. The plants and animals there are not necessarily competitive, so we'd start losing various precious biodiversity（生物多样性） on the (Antarctic) continent”, Bergstrom told Reuters.

    Amongst the alien species discovered were the Iceland Poppy, and Annual Winter Grass — all from cold climates and capable of growing in Antarctica.

    The Antarctic Peninsula, where most tourists travel, is now considered a “hot spot” on the frozen continent and the warmer the climate, the easier for seeds to grow. “The peninsula(半岛) is warming at some of the greatest rates on the planet,” said Bergstrom.

    The study, the first continent-wide assessment of invasive species in Antarctica, surveyed about 1,000 passengers during 2007-2008, the first year of the International Polar Year, an international effort to research the polar areas.

    Bergstrom said the one alien seed that had gained a foothold is Annual Winter Grass. It is a strong weed in the sub-Antarctic and is on the Antarctic island of King George. It has also made its way to the tail part of the Antarctic continent.

    To help the environment, many Americans have made the change from paper and plastic bags to reusable shopping bags.But a report by a Florida newspaper says that reusable shopping bags sold by some supermarkets have high levels of lead(铅), which can be dangerous to humans, especially young children.Now, there's a call for a rethink about the use of reusable shopping bags.

     “When our families go to the store looking for safe and healthy foods, the last thing they should be worrying about is a bag，”Charles Schumer, a government official said.“Quick and complete research will allow everyone to make right decisions.”

    The newspaper bought more than a dozen bags sold at Publix supermarkets from Florida supermarkets to test them for lead.The results showed that certain bags had lead levels that worried health officials.Some bags had enough lead in them to be considered dangerous waste if people were to throw the bags out with other rubbish.Lead in the bags is not likely to move onto food.But over time, paint (油漆) on the bags can break off and the bags can wear out.When this happens, lead can be freed.

    The affected (受影响的) bags were found in Florida.But Publix has more than 1，000 stores across America.Publix says that its bags don't break any laws about lead levels, but that they have asked the makers of the bags to reduce(降低) the lead levels in them.

    The bags with the highest levels of lead had beautiful designs and many pictures.Plain reusable bags without them are found to have little lead.People worried about lead levels in reusable bags can turn to cloth.Paper bags are also a good choice, since paper can be reused.

    People have smoked cigarettes for a long time now. The tobacco which is used to make cigarettes was first grown in what is now part of the United States. Christopher Columbus, who discovered America, saw the Indians smoking. Soon the dried leaves were transported to Europe. In the late 1800s, the Turks made cigarettes popular.

    Cigarette smoke contains at least two harmful substances, tar and nicotine. Tar, which forms as the tobacco burns, damages the lungs and therefore affects breathing. Nicotine, which is found in the leaves, causes the heart to beat faster and increases the breathing rate. Nicotine in large can kill a person by stopping a person's breathing muscles. Smokers usually take in small amounts that the body can quickly break down.

    Nicotine can make new smokers feel dizzy(头晕) or sick to their stomachs. The heart rate for young smokers increases 2 to 3 beats per minute. Nicotine also lowers skin temperature and reduces blood flow in the legs and feet. It plays an important role in increasing smokers' risk of heart disease and stroke.

    Smoking cigarettes is dangerous. Cigarette smoking was the cause of lung cancer and several other deadly diseases.

    Our summer vacation begins on July 15th and lasts nearly two months. Considering that my brain needs rest after a period of hard work, I, together with my family, went to our countryside, a very small farmhouse in which my grandparents used to live, to spend the summer. Obviously, life in the country is very different from that in the city.

    Early in the morning I took a walk along the field side. The air was fresh and pure. With a dog following, sometimes I ran a race in the meadows covered with tall grass. Sometimes I climbed up the hill to see the sun slowly yet steadily rise from the eastern horizon. The birds also sang restlessly among the bushes. In order to appreciate the quietness of the country, I gave myself entirely to nature, with a light heart and a happy mind.

    Sometimes in the afternoon I, together with my cousins, took a rod and went to the river to fish. It made the family happy when they saw me returning with a basketful of large fresh fish. When night came, I would sit at the door and tell the most wonderful and interesting stories to my cousins, who listened to the tale of wonder with open eyes and mouth.

    I wish I could enjoy such calm, pure and beautiful rural life forever.