A warm drink of milk before bed has long been the best choice for those wanting a good night's sleep. But now a study has found it really does help people nod off—if it is milked from a cow at night.

    Researchers have discovered that “night milk” contains more melatonin (褪黑激素), which has been proven to help people feel sleepy and reduce anxiety.

    The study, by researchers from Seoul, South Korea, involved mice being fed with dried milk powder made from cows milked both during the day and at night.

    Those given night milk, which contained 10 times the amount of melatonin, were less active and less anxious than those fed with the milk collected during daytime, according to the study published in The Journal of Medicinal Food.

    Night milk quickened the start of sleep and caused the mice to sleep longer.

    While the effect of cows milk harvested at different time has not been tested on humans up to now, taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.

    Previous studies have also indicated that milk can be excellent for helping sleep because of the calcium content, which helps people to relax.

    Milk is also sugar-free and additive-free with nutritionists recommending skimmed milk as the best choice before bed as it is the least fattening. The more fat you take in before bedtime, the greater burden you will put on your body at night.

    Millions of people all over the world use the word okay. In fact，some people say the word is used more often than any other word in the world.

    It may be common，but no one can seem to agree on how the “OK” came to be.

    Okay means “all right” or “acceptable”. It expresses agreement or approval. You might ask your brother，“Is it okay if I borrow your car?” Or if someone asks you to do something，you might say，“Okay ， I will.” Still，language experts do not agree about where the word came from.

    Some people say it came from the Native American Indian tribe known as the Choctaw. The Choctaw word “okeh” means the same as the American word okay. Experts say early explorers in the American West spoke the Choctaw language in the nineteenth century. The language spread across the country.

    But many people dispute(不同意)this.

    Language expert Allen Walker Read wrote about the word okay in reports published in the 1960s.He said the word began being used in the 1830s.It was a short way of writing a different spelling of the words “all correct.” Some foreign-born people wrote “all correct” as“o-l-l k-o-r-r-e-c-t.” and used the letters O.K.

    Other people say a railroad worker named Obadiah Kelly invented the word long ago. They said he put the first letters of his names—O and K—on each object people gave him to send on the train.

    Still others say a political organization invented the word. The organization supported Martin Van Buren for president in 1840.They called their group，the O.K. Club. The letters were taken from the name of the town where Martin Van Buren was born—Old Kinderhook，New York.

    Not everyone agrees with this explanation，either. But experts do agree that the word is purely American. And it has spread to almost every country on Earth.

    When my father married my mother in 1943 he gave my mother a 1937 crown coin and told her to keep it in the back of her purse and not spend it. This would mean that she always felt that she was protected and would always have money if she really needed it.

    When I was married in 1970 my husband who had heard this story obtained a 1937 crown for me and I have always kept it in my wallet and I have always had enough for my needs.

    A friend recently fell on hard times partly through external (外部的) circumstances and partly through poor planning. Friends and I have loaned her money, paid her bills, even given her food and tried to teach her budget techniques, but none of them has been a solution. She has just slipped deeper and deeper into financial trouble and depression.

    Last week she looked pale and unwell, very depressed and hopeless. I then thought about how the crown, a reminder of another's care and love, had protected me so I went to the bank for a $100 dollar bill. I told my friend the story and asked her to keep the $100 in the back of her wallet. It turned out that she didn't have a wallet so she put the money in a little pencil case where she kept her coins. She immediately felt better. "I feel rich and thank you for being a good friend" she said and we were both a bit teary.

    The reason for passing this on is not to praise any generosity on my part but to show the power of "random acts of kindness". I went home and remembered a little wallet I had that I'd never used and thought "I'll give that to my friend." I opened it and inside found $100. The universe is very just and if your heart is open the reward always comes.

    We are deep into January, and winter is in full swing. The days are short, grey, and cold, and many of us are fighting the annoying u Winter Blues". Yes, lack of sunlight can cause a type of depression called seasonal affective disorder (or SAD). Sunlight causes an increase in serotonin­a "happy hormone" ­in your body, and with a long winter ahead of us we must look for other choices to improve our moods.

    One of the best ways to fight off SAD is with light treatment. This treatment is safe, accessible, and easy and there is a wide range of different light lamps available on the market. After about 3 weeks of using the lamp for about 30 minutes a day, users report that their symptoms greatly improve. Most of these lamps are small and simple, and can easily slip into your home's decoration­just switch it on and carry on with your normal day.

    When buying your light treatment device(设备), keep a few things in mind. Make sure that the light you are buying gives off at least 10, 000 lux of light. Less than that and the light might not be effective. There are many reviews online, and it will be easy to find the best lamp for you.

    Try to find one whose bulb is easy to find and replace. You don't want to be stuck trying to figure out how to put the lamp back together.

    Finally, do your full research. There are so many different types and styles of lamp. Do you miss exercising outside? There is even one that you can put to your treadmill（跑步机）in order to copy running outdoors.

    There are larger lamps which are considered to be the most effective. There are small, nice lamps that don't take up too much space. There are modern designs such as vintage­style light­bulbs. There are even happy lamp alarm clocks, which are like sunrise, giving their users a gentle, natural wake­up.

    So, no need to go on a trip to Jamaica to get some sun and shake out the winter blues­instead, invest in a happy light which will keep your home sunny and happy all winter long!

    A night at the movies is always a good idea. But when you leave the theater and realize you just dropped $45 on a ticket and some snacks, you'll wish you had been patient enough to wait until the movie came out on Netflix. The average movie ticket price in the United States in 2000 was $5.39; now, a ticket is over $9.

    The main reason that movie tickets have gotten so expensive is because of inflation(通货膨胀). It was actually more expensive to go to the movies in the 70s than it is now. A ticket in 1978 cost $2.34. If you plug that into an inflation calculator, the same ticket would cost you $9.46 today. According to the National Association of Theater Owners, the average cost for a ticket today is $9.11.

    Another reason you need to dip into your life savings to see a movie on the big screen is that theaters are competing with streaming services that produce their own films, such as Netflix, Hulu, and Amazon. And let's be honest, sitting at home on your couch or in your bed is more comfortable than sitting in a cold theater.

    Because of streaming technology, movie theaters have to do something to bring in customers. Attractions­including alcohol, reclining seats(躺椅), surround sound, and 3-D movies are all examples of that. And those upgrades come at a price, leading to more expensive tickets.

    "There's all that extra cost, and it's really important for theater owners and companies to make that experience as enjoyable as possible," Patrick Corcoran, vice president of the National Association of Theatre Owners told Marketplace. "Because you're offering a superb experience­audience expectations are for the latest and greatest technology. Audiences are willing to pay more for a particular experience."