While we all try to find happiness, sometimes we still end up feeling low. While most people can control this feeling, low moods can stay with some, leading to depression. About 322 million people suffered from depression in 2015, according to a report by the World Health Organization in February. This is more than 4 percent of the world's population.

    Depression is described by the WHO as a mental disorder. It has several symptoms including sadness, loss of interest and feelings of low self-worth. In severe cases, depression may even lead to suicide.

    The number of people living with depression is increasing. The WHO reported a rise of 18.4 percent between 2005 and 2015. Young people are a group known to suffer with depression. “The pressures on today's youth are like no other generation, perhaps,” Dan Chisholm, an official of WHO, told Reuters.

    In China, depression among young people is on the rise, Zhu Zhuohong, a psychology professor with the Chinese Academy of Sciences, told Xinhua News Agency. Competition to outperform others, especially in education, can cause a lot of pressure for Chinese youth.

    Almost 1.2 million Chinese people aged 15 to 24 suffer from depression, according to a report released by British science journal The Lancet in May.

    Luckily, more and more efforts are being made to deal with this problem. This year's World Health Day, held on April 7, will focus on depression. The day will highlight (强调) the “Depression: let's talk” campaign. The campaign aims to make sure that people with depression both seek and get help.

                                                                      Amazon Best Sellers: Best Books

    A Higher Loyalty: Truth, Lies, and Leadership-April 17, 2018by James Comey

    In his book, former FBI director James Comey shares his never-before-told experiences from some of the highest-risk situations of his career in the past two decades of American government, exploring what good, ethical（道德的）leadership looks like, and how it drives sound decisions. His journey provides an entry into the corridors of power, and a remarkable lesson in what makes an effective leader.

    Hardcover $17.99

    12 Rules for Life: An Antidote to Chaos- January 23, 2018 by Jordan B. Peterson

    What does everyone in the modern world need to know? Famous psychologist Jordan B. Peterson's answer to this most difficult of questions uniquely combines the hard-won truths of ancient tradition with the great findings of most-advanced scientific research.

    Hardcover $15.57

    How to Read a Book: The Classic Guide to Intelligent Reading Revised Edition by Mortimer J. Adler, Charles Van Doren

    With half a million copies in print, How to Read a Book is the best and most successful guide to reading comprehension for the general reader, completely rewritten and updated with new material. Originally published in 1940, this book is a rare phenomenon, a living classic that introduces and clarifies the various levels of reading and how to achieve them-from elementary reading, through systematic skimming and inspectional reading, to speed reading.

     Paperback $10.31

    Everybody, Always: Becoming Love in a World Full of Setbacks and Difficult People- April 17, 2018 by Bob Goff

    Paperback $10.19

    What happens when we stop avoiding difficult people and simply love everyone? In his wildly entertaining and inspiring follow-up to the New York Times bestselling phenomenon Love Does, Bob Goff takes readers on a life-altering journey into the secret of living without fear, care, restriction, or worry.

    About three decades ago, China was known as the “Bicycle Kingdom”. But later on, bikes were replaced by their fuel-powered competitors.

    But recent months have seen a recovery of the humble bike across China, with an increasing number of people choosing cycling instead of driving to schools, to workplaces or to do sightseeing. The introduction of bike-sharing schemes, pioneered by start-ups like Ofo and Mobike, has brought the trend to a new level.

    People can unlock the shared bikes by simply using their smart phone. The bikes are equipped with GPS and can be left anywhere in public for the next user. They're popular among many Chinese people as they provide an effective solution to the “last mile” problem, which refers to the final leg of a person's journey.

    “In places where the subway doesn't extend, where it's difficult to change from one kind of transport to another, it's so easy to get where you want to go with Mobike,” Hu Hong. 29, told AFP. She pedals（骑车）to her Shanghai real-estate job.

    However, the schemes have also led to problems such as illegal parking, vandalism（故意毁坏）and theft. Last month, two nurses in Beijing were placed under administrative punishment for five days for putting locks on two shared bikes. And in December, a man who stole a shared bike was sentenced to a 3-month detention（拘留）, and fined 1,000 yuan by the Shanghai Minhang People's Court.

    “Bike-sharing is a greener method of transportation and provides a user-friendly experience.” said Liu Xiaoming, vice-minister of transport.

    “But it's a combination of online and offline business. Operators are usually strong in online services, but lack offline business experience, which causes problems.”

    When we think someone is smart，we say they have a big brain．But are there any facts to prove that statement？

    Yes! In a new study done by Michael McDaniel, a psychologist at Virginia Commonwealth University，bigger does mean smarter. "For all ages and sex groups，"he says，"it is now very clear that intelligence has something to do with brain volume（容量）．"

    McDaniel reached his conclusion after measuring the size and volume of 26 brains with the help of some instruments. He then used standard IQ tests to measure the intelligence of the owners of these brains.

    But do IQ tests really reveal intelligence？McDaniel believes that they do，and here are other studies to backup that point of view．One study last year found that IQ is related to the amount and distribution（分布） of gray matter in the brain．The study showed that the amount of gray matter in certain places was strongly related to high IQ．The distribution of gray matter in the brain，which is different for different people，could explain why one person with a high IQ is good at math but poor at spelling，while someone else with the same IQ has just the opposite ability．

    Yet another recent study found that women have more gray matter（compared with white matter） than men！However，the study also showed that in the areas of the brain specifically（特别地） related to intelligence，men had much more gray matter，which is needed for some tasks，such as doing a math problem. Women, on the other hand, had more white matter, which is necessary for collecting information．And the point is that intelligence can be influenced in different ways．

    "On average，"McDaniel says，"smarter people learn more quickly，make fewer mistakes，and are more productive．"He believes in the use of IQ tests to examine those who want to find a job. So, be well, do good work, and…exercise that brain!

    Just like rice and noodles are different from bread, snacks in China are a world apart from those in the UK and the US. For one thing, I never imagined that sunflower seeds (瓜子) would be so popular here. I spotted people having them while waiting for tables outside restaurants, before dinner and, of course, while watching TV. I also saw that a plate of sunflower seeds is always on offer during the Spring Festival holidays.

    I had seldom tried sunflower seeds when I came to China. In the UK, though, young people love their snacks. In fact, young people in Britain eat more snacks than people of the same age in other European countries. A recent survey has discovered that 64 percent of under 20-year-olds snack between meals, according to an article on the British Council website. In comparison (对比), 58.7 percent of young people snack in Germany, 53 percent in France, and only 40.7 percent in Spain.

    British snacks are generally unhealthy. Our favorites are probably potato chips, which we call crisps, and chocolate bars. From a very young age, we always looked forward to our crisps and chocolate bars after school, perhaps even included with sandwiches and fruit in our school lunches that our parents made for us.

    Snacks are also popular in the US. One of the things that I found the most extraordinary when I first visited the US was the number of snacks in their supermarkets; I was surprised to find huge aisles (过道) just for snacks that were bigger than some stores I'd been to in the UK. Snack tastes in the US are much the same as those in the UK, except there's much more choice – every kind of fatty, sugary food is available (可获得的) to everyone all the time.

    All in all, it's probably best for your health if you like sunflower seeds rather than potato chips and chocolate. But eating these delicious treats at times couldn't possibly be wrong, could it?

    Unlike most other holidays, the history of April Fools' Day, sometimes called All Fools' Day, is not totally clear. The only point in time that can be agreed on as the beginning of this tradition was 1582, in France. Before that year, the New Year was celebrated for eight days, beginning on March 25th. The celebration reached the highest point on April 1st. With the reform of the calendar under Charles IX，the Gregorian calendar(公历，阳历) was introduced, and New Year's Day was moved to January 1st.

    However, because in those days communications were not as developed as they are today, many people did not receive the news for several years. Some people refused to accept the new calendar and continued to celebrate the New Year on April 1st. These backward people were considered "fools" by other people. They  were often sent on "fools" errands(徒劳无益的工作)  or were made the targets of jokes.

    This developed, over time, into a tradition of playing a trick on someone on the first day of April. The tradition eventually spread to England and Scotland in the eighteenth century. It was later introduced to the American colonies of both the Britain and France. April Fools' Day thus developed into an international fun feast, so to speak, with different nationalities specializing in their own kind of humor at the expense of their friends and families.