If you like texting and are trying to lose weight, a new study found that using texting(发短信) to track diet and exercise habits may help you lose weight.

    Previous research has shown that keeping food and exercise diaries improves the likelihood of success when you are using it to lose weight. Using a computer or a pen and paper to record information, however, can be a burden and cause some people to give up.

    Duke University researchers said using text messages to track eating and exercise habits can save time, and increase the chances that people will stick with their weight-loss rules.

    The study included 26 obese/fat women with an average age of 38. The women used daily texting as part of their weight-loss program. The text messages focused on tracking personalized goals, such as avoiding sugary drinks or walking 10,000 steps a day. Messages also provided brief feedback (反馈) and tips.

    Every morning, the women received a text from an automated system that said, “Please text yesterday's personal information of steps you walked and how many sugary drinks you had.” Based on the women's responses to the text message, the system sent another text with personalized feedback and tips.

    After six months, the women who used daily texting lost an average of nearly 3 pounds, while another group of women who used traditional methods to keep food and exercise diaries gained an average of 2.5 pounds, according to the study, which was published in the Journal of Medical Internet Research.

    “Text messaging has become popular and may be an effective method to simplify tracking of diet and exercise behavior,” Dori Steinberg, who was responsible for this research, said.

    Steinberg said, “Text messaging offers several advantages compared to other self-monitoring methods. Unlike web-based diet and exercise diaries, data in a text message can be entered quickly on nearly all cell phone platforms so it is very convenient to receive feedback. Besides, because of the limited number of words used in text messages, it saves time.”

    My dad loved pennies, especially those with the elegant stalk of wheat curving around each side of the ONE CENT on the back. Those were the pennies he grew up with during the Depression (大萧条).

    As a kid, I would go for walks with Dad, spying coins along the way—a penny here, a dime (一角硬币) there. Whenever I picked up a penny, he'd ask, "Is it a wheat?" It always thrilled him when we found one of those special coins produced between 1909 and 1958, the year of my birth.

    One gray Sunday morning in winter, not long after my father's death in 2002, I was walking down Fifth Avenue, feeling bereft. I found myself in front of the church where Dad once worked. I was warmly shown in and led to a seat. Hearing Dad's favorite "A Mighty Fortress Is Our God", I burst into tears. We'd sung that at his funeral. After the service, I shook the pastor's hand and stepped onto the sidewalk—and there was a penny. I bent to pick it up, turned it over, and sure enough, it was a wheat. A 1944, a year my father was serving on a ship in the South Pacific.

    That started it. Suddenly wheat pennies began turning up on the sidewalks of New York everywhere. I got most of the important years: his birth year, my mom's birth year, the year he graduated from college, the year he met my mom, the year they got married, the year my sister was born. But alas, no 1958 wheat penny—my year, the last year they were made.

    The next Sunday, after the service, I was walking up Fifth Avenue and spotted a penny in the middle of a crossing. Oh, no, it was a busy street; cabs were speeding by—should I risk it? I just had to get it.

    A wheat! But the penny was worn, and I couldn't read the date. On arriving home, I took out my glasses and took it to the light. There was my birthday!

    I found 21 wheat pennies on the streets of Manhattan in the year after my father died, and I don't think that's a coincidence.

    I have been unusually silent these past ten months. I had thought that silence would soon be coming to an end,, but I'm afraid I must tell you now that fate（命运）has decided on a different course for me.

    In August of last year, I underwent surgery to remove a cancerous tumor in my abdomen. That operation was thought to have been a success, but it caused a series of secondary complications – which I have been fighting in hospital ever since. It was along and hard fight with many setbacks, but I was steadily, if slowly, overcoming each obstacle along the way and gradually making my way back to health.

    However, recent tests have revealed that the cancer has returned. There was no sign or it as recently as a month ago, which means it is aggressive and spreading rapidly. My doctors tell me their best estimate is that I have only a few weeks left to live. This is the final conclusion. My fight is over.

    I wish to thank my doctors and caregivers, who efforts have been magnificent. My dear friends, who have given me a lifetime of memories and whose support has sustained me through these difficult months. And all of my partners at The Washington Post, Fox News, and Crown Publishing.

    Lastly, I thank my colleagues, my readers, and my viewers, who have made my career possible and given consequence to my life's work. I believe that the pursuit of truth and right ideas through honest debate and thorough argument is a noble undertaking. I am grateful to have played a small role in the conversations that have helped guide this extraordinary nation's destiny.

    I leave this life with no regret. It was a wonderful life – full and complete with the great loves and great endeavors that make it worth living. I am sad to leave, but I leave with the knowledge that I lived the life that I intended.

    High school biology teacher Kelly Chavis knew smart phones were a problem in her class. But not even the students realized how much of a problem the devices were until Chavis did an in­class experiment.

    For one class period, students used a whiteboard to count every Snapchat, Instagram, text, call that appeared on their phones. Chavis is among a growing number of teachers, parents and health experts who believe that smart phones are now partly to blame for increasing the levels of student anxiety. "One girl, just during the one hour, got close to 150 Snapchat notifications. 150!" she said.

    Jean Twenge, a psychology professor at San Diego State University in California, said it is not a coincidence that youth mental health issues have risen with the number of phones. "This use of phones has led to a loss of sleep and face­to­face interactions necessary for their growth," she said.

    Researchers are still not sure whether phones cause student depression or depression causes phone use. But nearly 60 percent of parents said they worry about the influence of social media on their child's physical and mental health.

    Both schools and parents are starting to take steps to deal with the problem. Many public schools pay outside companies to watch students' social media activity for signs of anxiety. Other schools invite in yoga teachers and comfort dogs to help calm students.

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    In many developed countries, people who have high degrees begin to work longer than those who don't. About 65% of American men aged 62－74 with a professional degree are in the workforce (劳动人口), compared with 32% of men who only finish high school. This gap is part of a deepening divide between the well-educated wealthy and the unskilled poor. Rapid technological advance has raised the incomes of the highly skilled while squeezing those of the unskilled. The consequences, for individuals and society, are profound (意义深远的).

    The world is facing an astonishing rise in the number of old people, and they will live longer than ever before. Over the next 20 years the global population of those aged 65 or more will almost double, from 600 million to 1.1 billion. The experience of the 20th century, when greater longevity (长寿) translated into more years in retirement rather than more years at work, has persuaded many observers that this shift (变化) will lead to slower economic growth, while the swelling (渐增的) ranks of pensioners will create government budget problems.

    Policies are partly responsible. Many European governments have abandoned policies that used to encourage people to retire early. Even the better-off must work longer to have a comfortable retirement. But the changing nature of work also plays a big role. Pay has risen sharply for the highly educated, and those people continue to reap (获得) rich rewards into old age because these days the educated elderly are more productive than the preceding (先前的) generation. Technological change may well reinforce (强化) that shift: the skills that complement (补充) computers, from management know-how to creativity, do not necessarily decline with age.