In choosing a friend, one should be very careful. A good friend can help you study. You can have fun together and make each other happy. Sometimes you will meet fair­weather friends. They will be with you as long as you have money or luck，but when you are down, they will run away. How do I know when I have found a good friend? I look for certain qualities of character，especially understanding, honesty and reliability(信任)．

    Above all else, I look for understanding in a friend. A good friend tries to understand how another person is feeling. He is not quick to judge. Instead, he tries to learn from others. He puts himself in the other person's place, and he tries to think of ways to be helpful. He is also a good listener.

    At the same time, however, a good friend is honest. He does not look for faults in others. He notices their good points. In short, a friend will try to understand me and accept me.

    Another quality of a friend is reliability. I can always depend on a good friend. If he tells me he will meet me somewhere at a certain time, I can be sure that he will be there. If I need a favor，he will do his best to help me. If I am in trouble, he will not run away from me.

    There is a fourth quality that makes a friend special. A special friend is someone with whom we can have fun. We should enjoy our lives, and we would enjoy our friendship. That is why I especially like friends who are fun to be with. A good friend likes the same things I like. We share experience and learn from each other. A good friend has a good sense of humor too. He likes to laugh with me. That is how we share in the joy of being friends. And I know that he is looking for the same quality in me.

    When I meet someone who is reliable, honest, and understanding，I know I've found a friend!

    The gray-haired lady can't wait to leave the building to search for her dad. Unless watched, she will walk in the streets in an effort to find her father, who died 30 years ago.

    Not all cases of Alzheimer's disease look like this, but Alzheimer's is a serious disease that is said to be the fourth or fifth leading cause of death for people over age 75. It is said that about three percent of the U.S. population over age 65 have Alzheimer's. In the early stages; people may exhibit short-term memory loss. Some may experience changes in personality, easy to be angry. As the disease progresses, patients might lose the ability to move and may be unable to speak or move at all. This progressive disease generally lasts 8 to 10 years before death occurs.

    While no one is certain what causes these changes in the brain's nerve fibers, their effect is certain. Alzheimer's destroys not only the patients, but also spouses（配偶）, friends and families.

    What should you do if you notice progressive memory loss in yourself or a loved one? Have the person examined by a doctor who is a specialist in the treatment of Alzheimer's disease. Though many reasons other than Alzheimer's disease may cause memory loss, its early diagnosis（诊断）and treatment may delay some of the most serious effects.

    What feeling will you likely experience if a loved one suffers from Alzheimer's disease? A person will often go through the various stages of sadness, shock, anger, and so on. If the spouse develops the disease, you may experience hurt and disappointment when he or she doesn't remember you are married.

    Life for the Alzheimer's patients and their loved ones will never be the same as the disease progresses, bringing a deep sorrow, loss and even anger towards God. No matter what feelings are present, facing them honestly will serve one better than burying them.

    Our brains work in complex and strange ways.There are some people who can calculate the day of the week for any given date in 40,000 years,but who cannot add two plus two.Others can perform complex classical piano pieces after hearing them once,but they cannot read or write.

    Dr.J.Langdon Down first described this condition in 1887.He called these people idiot savants.An idiot savant is a person who has significant mental impairment（损伤）,such as in autism（孤独症，自闭症）or retardation.At the same time,the person also exhibits some extraordinary skills,which are unusual for most people.The skills of the savant may vary from being exceptionally gifted in music or in mathematics,or having a photographic memory.

    One of the first descriptions of a human who could calculate quickly was written in 1789 by Dr.Benjamin Rush, an American doctor.His patient,Thomas Fuller,was brought to Virginia as a slave in 1724.It took Thomas only 90 seconds to work out that a man who has lived 70 years,17 days,and 12 hours has lived 2,210,500,800 seconds. Despite this ability,he died in 1790 without ever learning to read or write.

    Another idiot savant slave became famous as a pianist in the 1860s.Blind Tom had a vocabulary of only 100 words,but he played 5,000 musical pieces beautifully.

    In the excellent movie Rain Man,made in 1988 and available on video cassette,Dustin Hoffman plays an idiot savant who amazes his brother played by Tom Cruise,with his ability to perform complex calculations very rapidly.

    Today we more clearly recognize that the idiot savant is special because of brain impairment.Yet not all brain impairment leads to savant skills.Some studies have shown that people who have purposeful interruption of the left side of the brain can develop idiot savant skills.However few people wish to participate in such experiments.There are many excellent reasons for not undergoing unnecessary experimentation on one's brain.The term idiot savant is outdated and inappropriate.Virtually all savants have a high degree of intelligence and are thus not idiots.

    What is it that makes people laugh? More than two thousand years ago the ancient Greek philosopher Aristotle defined (定义) jokes as the pleasure that results from a feeling of triumph(胜利) by showing we're better than someone else in a certain way. According to Aristotle and many other philosophers，all jokes depend mainly on showing inferiority in another person or group of persons—that is，putting it clearly，on showing that they are worse off than ourselves. Jokes raise our good opinion of ourselves at someone else's expense.

Showing how much better than other people we are is only one reason we like jokes. Someone may also use a joke to express their anger or their cruelty or any other kind of action that is not acceptable to us. We feel free to laugh when we hear about someone sliding on a banana skin. The joke lets us express those attitudes which are usually unacceptable to society. This is probably the reason why some of the jokes，especially those involving cruelty，are so popular with certain people.

    Besides，all jokes depend on our enjoyment of laughing at something that is strange and out of place because it's different from things which are happening around it. The same situation can be either sad or pleasant，depending entirely on how strange and out of place it is. If a girl in a bathing suit falls into a swimming pool，we don't laugh because nothing unusual has happened. But if a man in a smart suit falls in，the situation is at once unusual in a pleasant way and we laugh. A good joke-teller will always try to build up a situation in which one thing is expected until something unexpected suddenly happens，and so we laugh.

                                                                                   Journey to Asia in 2018

    Follow the Silk Route

    Though they were ruled by Russia for more than 100 years, Uzbekistan and Turkmenistan have remained far more connected to their earlier histories. This 11-day journey, with guidance from Times-selected experts, will take you deep into the heart of these Silk Road nations.

    Journey 11 days

    Time Apr. 15, May 20 and Sept. 23, 2018

    Travelers 20

    Costs $ 6,495

    Saudi Arabia and the Emirates: The Past and Future of Oil

    Oil transformed the Arabian Peninsula, bringing wealth to the traditional area as well as problems with the Western nations that needed it. Learn more on this journey accompanied by New York Times - selected experts. Explore the conservatism（保守主义）that existed in Saudi Arabia, and then see the modern architectural city Abu Dhabi.

    Journey 10 days

    Time Oct. 23 and Nov. 6, 2018

    Travelers 24

    Costs $11.695

    Seventy Years of the State of Israel

    In 2018, Israel will observe its 70th anniversary as a nation. But its history goes back more than 5,000 years, and even now, its future promises many difficulties. On this nine-day journey, travel with experts from the New York Times, a leader in its even-handed coverage of Israel, Palestinians and the Middle East. Enjoy extraordinary opportunities to hear from opinion makers, scholars, grassroots activists and media experts.

    Journey 9 days

    Time Mar. 18 and Oct. 7, 2018

    Travelers 25

    Costs $6,995

    Kashmir: The Religious Melting Pot of India

    One of the most populous nations on earth. India also has some of the most varied religions on earth. On this 13-day journey: explore this nation's colorful religious history, from Delhi to Kashmir, with expert guidance and unparalleled access to remote areas.

    Journey 13 days

    Time Mar. 24, Apr. 14 and Oct. 6, 2018

    Travelers 20

    Costs $7,895

    There's a word of wellness I've loved for years. It's HALT: the idea that if you want to be calm and content, never let yourself get too hungry, angry, lonely or tired. Researchers are increasingly looking more closely at the "L" in "HALT", with one report presented to the American Psychological Association finding that long-term loneliness might be a greater public health risk than obesity.

    Loneliness is a problem with many faces. Some people are alone most of the time—data collected by the United Kingdom found that 200, 000 people over the age of 75 had not had a conversation with a friend or a relative in more than a month. But some people feel lonely even in a crowded room, disconnected from meaningful relationships even though their days are filled with people.

    To me, walking a positive path means walking alongside others—people who lift our spirits, share our values, challenge us to grow and learn and bring us joy. But social satisfaction doesn't come automatically or even easily to too many people. And in our age of individualized electronic devices, social media and text-based communication, it can be harder than ever to feel truly connected to others.

    I was so heartened to read that recently the British Parliament (议会) has created a "Minister for Loneliness" position to promote research, education and principles so as to cure what some researchers call "the loneliness disease". More and more doctors in America are also screening adult patients for loneliness at annual physical examinations, which is another promising sign.

    With proper social support and community participation, loneliness can be prevented from happening. If you are feeling lonely, make a list of your daily routines and ask yourself how you could add more social interactions to each day. Try reaching out for volunteer opportunities, clubs and organizations to join and old friendships to renew. If you are struggling, ask a consultant to help you identify your social obstacles and overcome them.