Researchers say current exercise guidelines are unrealistic and argue that doctors should sometimes advise small increases in activity instead. They warn the 150-minute weekly target is beyond the reach of some people - particularly older individuals. And striving to reach these goals could mean the benefits of lighter exercise are overlooked. But public health officials say current recommendations have proven benefits in lowering the risk of heart disease.

    There is increasing evidence that inactivity is linked to heart disease, Type 2 diabetes (糖尿病) and some types of cancer. UK guidelines for adults recommend at least two-and-a-half hours of moderate activity a week, in short periods of 10 minutes or more.

    But in two separate articles in the BMJ, experts argue the message needs to change, with greater emphasis on making inactive people move more. Prof Philipe de Souto Barreto at the University Hospital of Toulouse, advises people who sit too much to make small increases in their activity levels - rather than pushing to achieve current goals. He points to previous studies which show even short periods of walking or just 20 minutes of vigorous activity a few times a month can reduce the risk of death, compared to people who do no exercise.

In the second article, Prof Phillip Sparking of the Georgia Institute of Technology, says doctors should tailor their advice — particularly for older patients. He suggests using GP visits for people over 60 to discuss “realistic options” to increase activity — such as getting people to stand up and move during TV commercial breaks.

    Prof Kevin Fenton at Public Health England, says: “Everyone needs to be active every day — short periods of 10 or more minutes of physical activity have proven health benefits, but getting 150 minutes or more of moderate activity every week is the amount we need to positively impact on a wide range of health conditions.” This includes reducing the risk of heart disease and type 2 diabetes.”

    Most people who fly on passenger planes in the United States do not lose their luggage. Even if the luggage is lost, usually it is only delayed. Most “lost” luggage is found in a few days. Airlines search for the owners of unclaimed(未认领的) bags for up to three months. But when the owners cannot be found or the bags are not claimed, they are sold to a store in the small city of Scottsboro, in the southern state of Alabama.

    About one-half of one percent of all luggage passing through US airports is unclaimed. Many of the missing bags, and what is in them, are sold at the Unclaimed Baggage Center. Seven thousand items arrive at the store every day. Tom Barnes, who was shopping at the store said, “I can go into any of the large shopping centers, like the international malls. I can walk through there for an hour and come out with three items. But I come into this store, and then I come out with my car full of stuff.”

    Brenda Cantrell, who works at the store, said, “The Unclaimed Baggage Center is the only store in America that buys and resells unclaimed baggage from the airline industry. You would be surprised at all the jackets, eyeglasses, neck pillows, blankets, laptops, Kindles, iPads, and you know, all kinds of expensive electronics.”

    The store says it once sold a container for flowers for $80 that was found to be worth $18,000. And it says a painting it sold for $25 was later found to be worth $25,000.

    The store buys the luggage from the airlines. It does not examine the things inside them before buying them. Only about half of the items in the bags are suitable for sale at the store.

    Some people say it is not fair to the owners of the lost passage to sell their goods. Customer Daniel Martin is not one of them, saying, “I feel the airport may try to find the people that lose the things. If they've tried and they can't get a hold of them, it's better than throwing them away or just letting them rot in a warehouse somewhere.”

    Our world natural park is one of the most famous parks in the world. Millions of visitors from different countries visit this park every year. In order to protect it, please do as follows：

    Protect the natural and cultural heritage. Don't damage or deface any buildings, displays and other facilities. Take care of all plants. Put rubbish in the bins provided.

    Take care when you are going up and down steps or stairs and when you are walking nearby the waters.

    Please buy tickets before entering the scenic spot. One ticket is only for one person. Adult：＄60 per ticket. Children over 6 and under 18, half price. People over 60 and children under 6 are free.

    If you are going into the wooded and hilly lands, for your own safety, please go with three people at least and don't take any tinder(易燃物）along with you. The hill is steep so please take care of yourself.

    This scenic spot is the reserve of water source: No fishing, swimming, washing and any behaviors that are harmful to the water source. Meanwhile, please follow the management rules of the scenic spot conscientiously.

    Opening time：From Monday to Friday, 8：00 a. m.～18：00 p.m.；From Saturday to Sunday, 6：00 am.一24：00 p. m.

    Small animals such as rabbits, peacocks, squirrels, frogs must be taken care of: None of them shall be killed.

    If you have any trouble in visiting our world natural park, please call 477-866-7044. Our staff will do our best to help you.

Dear editor(编辑),

    Can't your newspaper do something about the custom (习惯) of hitchhiking?

    A short time ago, on a car travel I counted at least 50 people standing beside the road, asking for rides. Many of them were young women.

    Don't they understand how dangerous it is to get into the car driven by a stranger? How much do they know about the driver? Is he a good driver or not? They know nothing!

    Many of these young hitchhikers may come from good families. Don't their parents teach them anything about the world? I always taught my children not to talk to strangers. I never let them take rides from people they didn't know.

    Isn't there enough crime (犯罪) today without asking for trouble by hitchhiking? On the other hand, hitchhiking may bring some traffic trouble. Don't you think what I said is true?

    A Worried Grandfather

My challenge for you is this: to read a book for 15 minutes every single day for a month.

Let me explain a bit, by telling you where the challenge came from. I have many things in common with my dad, like music taste and sense of humor, but sadly reading isn't one of them. I can happily spend a whole day with a book, but my dad can't read a book for longer than about 5 minutes. He reads emails, websites and papers for work, but not books. He's busy, so I think sitting down to read for just 15 minutes a day is a good way to relax and to introduce him to reading.

My dad is not the only person who avoids books. I know lots of people would rather relax on their computers or in front of the TV. Everyone is different and has their own interests, but I think there are lots of benefits to reading, which screen-based activities don't have.

Firstly, it's better for your eyes. Looking at screens can be very stressful for your eye muscles, and clearly you should avoid looking at screens for an hour before bed, to get a good night's sleep.

One thing I personally love reading, is being transported to another world—I would often forget the time or things around me! Reading is a great way to switch off before you go to bed, because you think more about the world of the book, rather than the real world, so you can truly relax. I know you can be transported to a different world in a film or a TV show, but I think books do it better.

I also enjoy hearing what people are doing and finding out what they think. Reading gives me the chance to get to know hundreds of new people! It also teaches you to see things from other people's point of view, and understand other people's decisions or opinions. With a book, you can hear everything a character is thinking or feeling—you really can be inside someone else's head!

So give it a go! Take 15 minutes when you are waking up, going to bed, eating lunch, or having a coffee. If you read a lot, why not try 15 minutes of an English book, or pass the challenge on to someone else? Good luck, and happy reading!