The more hours that young children spend in child care, the more likely they are to turn out aggressive and disobedient by the time they are in kindergarten, according to the largest study of child care and development ever conducted. Researchers said this correlation (相关性) held true regardless of whether the children came from rich or poor homes, were looked after by a relative or at a center, and whether they were girls or boys.

    What is uncertain, however, is whether the child care actually causes the problem or whether children likely to turn out aggressive happen to be those who spend more hours in child care. It also remains unclear whether reducing the amount of time in child care will reduce the risk that a child will turn into a mean person. What's more, quality child care is associated with increased skills in intellectual ability such as language and memory, leading some academics to suggest that child care turns out children who are “smart and naughty”.

    The government-sponsored research, which has tracked more than 1,300 children at 10 sites across the country since 1991, is bound to cause the debate over child care again: How should people balance work and family? And how should parents, especially mothers. Resolve the demands that are placed on them to be both breadwinners and supermoms?

    That debate was already on display at a news briefing yesterday, where researchers themselves had different opinions about the data and its implications (含义). “There is a constant relationship between time in care and problem behavior, especially those involving aggression and behavior,” said Jay Belsky of Birkbeck College in London, one of the lead investigators of the study who has previously annoyed women's groups because of his criticisms of child care. “On behalf of fathers or mothers?” interrupted Sarah Friedman, a developmental psychologist at the National Institute of Child Health and Human Development (NICHD) and one of the other lead scientists on the study. “On behalf of parents and families,” responded Belsky.

    “NICHD is not willing to get into policy recommendations.” said Friedman, contradicting her colleague. “There are other possibilities that can be entertained. Yes it is a quick solution—more hours in child care is associated with more problems. The easy solution is to cut the number of hours but that may have implications for the family that may not be beneficial for the development of the children in terms of economics.” In an interview after the briefing, Friedman said that asking parents to work fewer hours and spend more time with their children usually meant a loss of family income, which adversely(不利地) affects children.

    Scientists said that the study was highly reliable. But the researchers said they had no idea whether the behavioral difficulties persisted as the children moved to higher grades.

    Australia's koalas could die out within 30 years unless immediate action is taken to stop the losing in population, according to researchers. They say development, climate change and bushfires have all combined to reduce the number of wild koalas sharply.

    The Australian Koala Foundation said a recent survey showed the population could have dropped by more than half in the past six years. The number of koalas was once estimated to be more than 100,000, but now is as few as 43,000.

    The foundation collected field data from 1,800 sites and 80,000 trees to calculate the numbers. In one area in northern Queensland estimated to have 20,000 koalas a decade ago, a team of eight people could not find a single animal in four days of searching.

    The foundation said besides problems caused by cutting down forests, hotter and drier conditions because of global warming had reduced the nutritional value of their main food, eucalyptus (桉树) leaves, leading to poor nutrition for them. Koalas, which live in the forests in Australia's east and south, are very picky about what types of the leaves they eat.

    Foundation chief Deborah Tabart said: “The koalas are missing everywhere we look. It's really no tree, no me. If you keep cutting down trees you don't have any koalas.”She is hoping the new figures will persuade the government's Threatened Species Steering Committee (TSSC) to list the koala as threatened. But committee chairman Bob Beeton said a decision was not likely recently and the koala's status as one of the country's favorite animals would not be a factor. “There's a number of species which are attractive and people have special feelings towards them. We don't consider that,” Mr Beeton said.

EVENTS

Aug.31-Sept.4,Laughter Bus

Cape Town, South Africa

Lovely sightseeing tour with laughter, fun and festivities. The tour departs(启程) from Cape Town towards the Garden Route, stopping at beautiful and interesting places, enjoying lunch at the seaside and sharing laughter with local communities. Cost:$800.

+277222-97454, info@laughterbus.co.za  Sept. 17-18, Laughter Yoga 2-day Certified Leader Training

Irvine, California, USA

10 am-5 pm daily at Irvine Valley College. Learn to laugh for health without the need of jokes. Start a laughter club, share laughter with elders and kids, and earn income sharing happiness. Includes practice with Jeffrey Briar. Costs: $ 295.

▪ (949)376-1939, JBriar@LYInstitute.org

Set. 30, Laughter is Serious Business Workshop

St. Albans, Hertfordshire, UK

A workshop for those who have completed Laughter Leader/Skills courses and want to get ideas and real advice on how to promote(提升) themselves. 10 am-3 pm with lunch break. Costs:￡100 (includes a￡25 DVD)

+44(0)1727-741-050, Jotte@unitedmind.co.uk Oct. 7-9, Laguna Laughter Club Mountain Retreat(静修)

Angelus Oaks, California, USA

Everyone is welcome on this three-day retreat in the pine forest of Redlands. Daily laughter yoga sessions, music, dancing, hiking, and vision-sharing. Costs:$150 (includes meals).

▪ (949)376-1241, Anne@LaughingAnne.com

Oct. 29-Nov. 5, Laughter Cruise in the Caribbean

The tour departs from Miami, Florida, USA. Daily laughter sessions, onboard programs, easy yoga classes, creating new exercises, fun and friendship! Holland America Lines. Costs: $719.

▪ (941) 349-6069, amy.ferrell@verizon.net

    The final results of Best-Ever Teen Fiction vote are in. While it's no surprise to see Harry Potter and The Hunger Games series on top, this year's list also highlights some writers we weren't as familiar with. For example, John Green, author of The Fault in Our Stars, appears five times in the top 100.

    Summer, like youth, passes quickly. But the books we read when we're young can stay with us for a lifetime. The following are the top 4 on the list. Enjoy.

    ⒈Harry Potter series

    The Harry Potter books make up the popular series written by J. K. Rowing. The series includes seven books. The books concern a wizard (魔法师) called Harry Potter and his journey through Hogwarts School of Witchcraft and Wizardry. The stories tell of him over coming dangerous obstacles to defeat the dark wizard Lord Voldemort who killed his parents when Harry was 15 months old.

    ⒉The Hunger Games series

    In the ruins of a future North America, a young girl is picked to leave her poor district and travel to Capitol for a battle to the death in the cruel Hunger Games. But for Katniss Everdeen, the main character in this series by Suzanne Collins, winning the Games only puts her deeper in danger as the strict social order of Panem begins to unravel (瓦解).

    ⒊To Kill a Mockingbird

    Author Harper Lee explores racial tensions in the fictional “tired old town” of Maycomb, Ala., through the eyes of 6-year-old Scout Finch. As her lawyer father, Atticus, defends a black man accused of a crime, Scout and her friends learn about the unjust treatment of African-Americans – and their mysterious neighbor, Boo Radley.

    ⒋The fault in Our Stars

    Hazel Grace, a teenage girl, has got all sorts of cancer inside her body, and her lungs aren't working very well. She knows she is dying and doesn't live in hope any more. When a man named Augustus Waters suddenly appears at the Cancer Kid Support Group, Hazel's story is about to be completely rewritten.

    The annual World Economic Forum (经济论坛) took place in Davos, Switzerland, in Jan. 23-26, 2018. What did Chinese entrepreneurs (企业家) speak in the forum? Are there some quotable quotes for you?

    Jack Ma, founder and executive chairman of Alibaba Group

    "I think globalization cannot be stopped — no one can stop globalization, no one can stop trade. If trade stops, the world stops. Trade is the way to dissolve (溶解，结束) the war not cause the war," said Ma in Davos, "Google, Facebook, Amazon and Alibaba — we are the luckiest companies of this century. But we have the responsibility to have a good heart, and do something good."

★Richard Liu, founder and chief executive officer of JD

    "Business is not only a way to make money but also a way to contribute yourself, to help people," Liu said in a speech in Davos. "How can we face the fractured (分化的)world? That's the topics of the Davos this year. I think a very important thing in business is cooperation. If we can unite, work together, if we work very closely, I think we can bring more hope to the people and we can build more trust between the people, countries and companies and partners," he said.

    Jane Sun, CEO of Ctrip

    "Tourism is a sunrise industry. Since I entered Ctrip, every year there are new comers, which, first of all, shows that tourism is booming." Sun told Sina.com in Davos. "We invested heavily in ABC. A refers to AI, B is big data, and C is cloud computing. As we continue to expand overseas, these three will be very good weapons for us. So we think those mean opportunity," she said.

★Hu Xiaoming, president of Aliyun

    "In 2018, people will see the development in various countries more closely connected with cloud computing. More manufacturing enterprises and financial institutions will start to use „cloud', and cloud computing will increase the efficiency of technology and finance," Hu told Xinhua in Davos.

After years of travel it was bound to happen. Waiting by the moving belt, I watched the suitcases make mocking(嘲弄的) rounds. My companions, exhausted after16hours in the plane, were sympathetic and relieved. They were all thinking: at least it wasn't me. Any moment now, I told myself, swearing at the happy vacationers busy collecting their things. What about my necessities (必需品)?

For millions of travelers a year, it happens. Their missing bags stolen, sold in blind auctions(拍卖), or gone forever without any explanation. Today it was my turn, in a crowded Indian airport, as far from home as I'd ever been.

So, while the airline hunted for my belongings with no any order or plan and asked whether I would rather have $200– I found myself wandering the hot streets of Delhi in an orange dress and a pair of blister-producing ballet flats. Equipped with my carry-on (contents: eyeglasses, a paperback, an ancient tube of Chapstick), I was forced to "manage".

Day two, good news. The bag had been found! Bad news: it is still sitting in Toronto. Did it miss me as much as I missed it?

But then, a twist. I survived. By day three, I was secretly enjoying myself. What to wear? Hello, orange. Make-up today? Not an option. With almost nothing, I found better things: a new understanding of necessity, a short break from my obsession(痴迷) with stuff, stuff and more stuff, and a new appreciation for what does matter (the Taj Mahal) , when my bag finally made its way back to me.

That's right, my jam-packed blue suitcase resurfaced – on day four – and I suddenly had a rainbow of ten dresses to choose from. I decided to wear my orange dress once more, for good luck. It worked: nothing went missing on my journey home.