Next time a customer comes to your office, offer him a cup of coffee. And when you're doing your holiday shopping online, make sure you're holding a large glass of iced tea. The physical sensation（感觉）of warmth encourages emotional warmth, while a cold drink in hand prevents you from making unwise decisions—those are the practical lesson being drawn from recent research by psychologist John A. Bargh.

    Psychologists have known that one person's perception（感知）of another's “warmth” is a powerful determiner in social relationships. Judging someone to be either “warm” or “cold” is a primary consideration, even trumping evidence that a “cold” person may be more capable. Much of this is rooted in very early childhood experiences, Bargh argues, when babies' conceptual sense of the world around them is shaped by physical sensations, particularly warmth and coldness. Classic studies by Harry Harlow, published in 1958, showed monkeys preferred to stay close to a cloth “mother” rather than one made of wire, even when the wire “mother” carried a food bottle. Harlow's work and later studies have led psychologists to stress the need for warm physical contact from caregivers to help young children grow into healthy adults with normal social skills.

    Feelings of “warmth” and “coldness” in social judgments appear to be universal. Although no worldwide study has been done, Bargh says that describing people as “warm” or “cold” is common to many cultures, and studies have found those perceptions influence judgment in dozens of countries.

    To test the relationship between physical and psychological warmth, Bargh conducted an experiment which involved 41 college students. A research assistant who was unaware of the study's hypotheses（假设）, handed the students either a hot cup of coffee, or a cold drink, to hold while the researcher filled out a short information form: The drink was then handed back. After that, the students were asked to rate the personality of “Person A” based on a particular description. Those who had briefly held the warm drink regarded Person A as warmer than those who had held the iced drink.

    “We are grounded in our physical experiences even when we think abstractly,” says Bargh.

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    Welcome to your future life!

    You get up in the morning and look into the mirror. Your face is firm and young-looking. In 2035, medical technology is better than ever. Many people your age could live to be 150, so at 40, you're not old at all. And your parents just had an anti-aging(抗衰老的) treatment. Now, all three of look the same age!

    You say to your shirt, “Turn red.” It changes from blue to red. In 2035, “smart clothes” contain particles(粒子) much smaller than the cells in your body. The particles can be programmed to change clothes' color or pattern.

    You walk into the kitchen. You pick up the milk, but a voice says,“ You shouldn't drink that!” Your fridge has read the chip (芯片) that contains information about the milk , and it knows the milk is old . In 2035, every article of food in the grocery store has such a chip.

    It's time to go to work. In 2035, cars drive themselves. Just tell your “smart car” where to go. On the way, you can call a friend using your jacket sleeve. Such “smart technology” is all around you.

    So will all these things come true? “For new technology to succeed,” says scientist Andrew Zolli ,”it has to be so much better that it replaces what we have already.” The Internet is one example—what will be the next?

    Some people believe that international sport creates goodwill between the nations and that if countries play games together they will learn to live together. Others say that the opposite is true: that international contests encourage false national pride and lead to misunderstanding and hatred. There is probably some truth in both arguments, but in recent years the Olympic Games have done little to support the view that sports encourage international brotherhood. Not only was there the incident of tragedy involving murder of athletes, but the Games were also ruined by lesser incidents caused principally by minor national contests.

    One country received its second-place medals with visible anger after the hockey final. There had been noisy scenes at the end of the hockey match, the losers objecting to the final decisions. They were convinced that one of their goals should not have been disallowed and that their opponents' victory was unfair. Their manager was in a rage when he said; "This isn't hockey. Hockey and the International Hockey Federation are finished." The president of the Federation said later that such behavior could result in the suspension of the team for at least three years.

    The American basketball team announced that they would not yield first place to Russia, after a disputable end to their contest. The game had ended in disorder. It was thought at first that the United States had won by a single point, but it was announced that there were three seconds still to play. A Russian player then threw the ball from one end of the court to the other, and another player popped it into the basket. It was the first time the US had ever lost an Olympic basketball match. An appeal jury（评审委员会）debated the matter for four and a half hours before announcing that the result would stand. The American players then voted not to receive the silver medals.

    Incidents of this kind will continue as long as sport is played competitively rather than for the love of the game. The suggestion that athletes should compete as individuals or in non-national teams, might be too much to hope for. But in present organization of Olympics there is far too much that encourages aggressive patriotism（爱国主义）.

    In 2019, a big revolutionary technology shift will finally occur, which is called 5g. It is a once-in a-decade upgrade(升级)to our wireless systems that will start reaching mobile phone users in a matter of months. This new times will leap ahead of current wireless known as 4g by offering mobile internet speeds that will let people download an entire 120-minute movie within a second

    But this is not only about faster smart phones, but also will affect many other kinds of devices, including industrial robots, security cameras, drones(无人机), automatic cars, video games, sports, shopping and traffic data. With 5g technology, a clearer and truer 3D images will be formed and it can be off-loaded to other machines wirelessly, freeing users to move and making it easier to develop goggles(目镜)the size of eyeglasses. People can point a smart phone camera to a football game and see both live video on the display and player statistics or other data. Moreover 5g powerful effects extend to remote medical surgery and other fields that increasingly rely on high-speed connections.

    Officials in the United States and China regard 5g networks as a heated competitive edge. It can help spread the use of artificial intelligence and other cutting-edge technologies. Meanwhile, to get the benefits of 5g, users will have to buy new phones, while carriers will need to install new communication services, which will create a huge future market. In order to occupy it first, the famous world wireless service providers such as AT&T, Verizon, Samsung, Huawei have already declared that they will enter 5g business and showed their 5g new smart phones.

    However, in the United States, Verizon and AT&T will offer their 5g service with first use of high frequencies known as millimeter waves that can pump data at high speeds, but their signals don't travel as far. Instead Sprint and T-Mobile plan to start with lower frequencies, whose result may be somewhat slower initial speed, but wider range, although they all claim that they have mastered 5g technology. Thus they only first target the areas with large population. So 5g's full benefit to all are not expected until the main US key carriers upgrade their key switching equipment, which may happen in late 2019 or early 2020.