How to Cure a Stomach Ache

    When your stomach is upset, it is difficult to concentrate or even get through your day. If you wish to cure a stomach ache and keep it from coming back, follow these steps.

    1）{#blank#}1{#/blank#}Don't start treating until you know the source of your pain. Your stomach is a big area so start by pinpointing your pain. Is there tightness in your lower abdomen or intestines? Or is there a burning high in your stomach?

    2）Stay hydrated. You need to drink water every day, no matter what. Dehydration can cause your stomach ache, tightness in your intestines and constipation. Drinking proper water each day helps your body function properly.{#blank#}2{#/blank#}

    3）Eat some crackers. Often pain in your stomach is caused by hunger or something disagreeable you have eaten. Fill the hunger with a few crackers to take the edge off. The crackers will also provide something to mix with any bacteria or other disagreeable items you may have consumed.

    4）Relax. {#blank#}3{#/blank#}Stand up to stretch, and take a walk to relax. This will also help loosen any tension your stomach is holding due to the ache you feel.

    5）Maintain a regular high-fiber diet. When your stomach aches often you need to take a look at your diet. {#blank#}4{#/blank#}If your digestive system is not working with a steady flow you will back up and feel the pain. Consuming high fiber foods will help you regulate your digestive system.

    6）Wait it out. Sometimes whatever is ailing you just needs to work its way out of your system. {#blank#}5{#/blank#}

    situation in which they had to observe two circles on a screen.

    At first glance,price-comparison websites are an example of capitalism at its best.But it has caused fierce competition on price and eviscerated profits.Towers Watson,a consultancy,said that "unnecessary" price competition following the rise of comparison sites in Britain had cost insurers ￡1 billion a year.

    Consumers should celebrate that;the firms' losses are their gains.But there is a catch.Comparison sites introduce a new layer of costs,including their own advertising campaigns.In theory,competition in the market for comparison sites ought to keep those costs down.But David Ronayne of Warwick University argues that consumers often lose out from comparison sites.They earn a commission for each shopper who uses them for consumption such as buying insurance.That referral（委托）cost is included in the price the consumer ends up paying.If the increased costs outweigh the saving the comparison enables,consumers end up worse off.

    These worries are not just theoretical.In 2014,Britain's competition regulator found that many comparison sites were using their contracts with retailers（零售商）to ban them from offering lower prices elsewhere.That weakened rivals' incentive（对手的动机）to cut fees,because prices on their site could not fall.By keeping prices similar,the contracts also reduced the incentive for consumers to search on multiple sites,thus helping sites retain their users.

    Weaker incentives to lower commissions mean weaker incentives to lower costs,too.That might explain why comparison websites advertise so heavily,and sometimes offer free gifts to those who use them.In a recent paper,Ben Edelman of Harvard Business School and Julian Wright of the National University of Singapore argue that when a site knows that the prices merchants provide through it will always be the lowest available,it increases investment in attracting customers,safe in the knowledge that the merchants and at last consumers will bear the cost.

    Is there any way to ensure the market for price comparison is competitive?Asking consumers to check multiple websites defeats the point of using them.One solution is to have only one site,but regulate it as a public utility（功用）. Alternatively,the governments could run the site itself.But creating good search and comparison sites may be too hard for them.It is much better to acknowledge that consumers will always have to do some comparison themselves to "keep the system honest".

    Websites that compare the comparison sites can help,although it is easy to see how they could fall prey to the same problems.Any firm with captive users（被动用户）,be it a comparison site a search engine,or a social-media platform,can charge a high price for access to the eyes of its customers.For all their innovation,Internet middlemen are not unlike supermarkets.Shoppers would never imagine that a single store had the lowest price for all the items they need.

    It's rare that the protagonist in a Chinese movie wins the audience's hearts with an emotionally uplifting message, rather than by showing off his or her good looks. But Wolf Warrior II is putting China in the global spotlight. It's also the first film to taste success both in terms of box office earnings and promoting Chinese values.

    Kung fu artist Wu Jing both starred in and directed the action movie. Since its release on July 27, it's earned an unimaginable 4.5 billion yuan, setting a record for domestic movies at the box office. The success of the film has surpassed the anticipations of all, including the production team.

    The film focuses on a rescue operation in Africa, led by former special forces soldier Leng Feng-played by Wu. Leng helps Chinese workers and local Africans flee a war-torn and plague-ravaged country. Wolf Warrior II links art to reality, and reminds people of the massive evacuation of Chinese people from Libya when civil war broke out there in 2011, and from Yemen in 2015, as well as the challenges the Ebola virus created in West Africa from 2013 to 2016. The film describes how the Chinese government aims to protect overseas Chinese citizens. Just as the message at the end of the film reads: “Citizens of the People's Republic of China. When you encounter danger in a foreign land, do not give up! Please remember, at your back stands a strong motherland.”

    Thanks to China's increasing participation in global affairs, now could be considered the right moment to introduce a modern Chinese hero.

    “Holding up a banner of peace, friendship and responsibility, Wolf Warrior II should be seen as a brave effort to promote Chinese values around the world,” columnist Zhu Ping wrote in China Daily.

    “It's time Chinese filmmakers produced films that tell good stories and carry the right spirit. Let us assume Wolf Warrior II has started that trend.”

    Many years ago, people relied on the sun, the moon and stars to find their way around. Later, the compass was introduced. And now, we have satnav（卫星导航）systems to guide us. A satnav system uses groups of satellites to show the user's location. They send information to a receiver, such as a smart phone, to show us where we are.

    The earliest built satnav system is the Global Positioning System, which belongs to the US. Then there is Russia's Global Navigation（导航）Satellite System, the European Union's Galileo and China's own satellite navigation system, BeiDou.

    On October 14, 2017, an ARJ21-700 plane, which was the first domestically-produced jet equipped with the BeiDou navigation system, successfully completed a test flight. The results showed the performance of the system developed by China matches that of similar systems produced abroad, according to the Commercial Aircraft Corporation of China.

    Since its introduction in 2000, the Beidou navigation system has seen increasing numbers of applications linked to everyday life, from shared bikes to farming.

    When it comes to shared bikes, smart locks that support BeiDou chips offer more accurate positioning than others, making it easier to find a bike.

    Farmers can use BeiDou-enabled tractors to plow（犁）the soil and use unmanned aircraft with BeiDou to sow seeds, which can improve efficiency and make better use of resources. BeiDou's farming applications have spread from Heilongjiang province to Beijing, Liaoning, Shanxi, Hubei and other regions across China.

    With its many uses, the Beidou navigation system is even playing a big role in the Belt and Road Initiative（— 带—路）. “To date, the BeiDou system has covered most parts of the Asia-Pacific region, as well as counties along the Silk Road Economic Belt and the 21^st Century Maritime Silk Road” said Yang Changfeng, Chief designer of the BeiDou system.

    Today, there are more than 20 BeiDou satellites above our heads, and China plans to launch even more this year to expand the BeiDou network to better serve the Belt and Road Initiative.

    “As BeiDou expands its overseas reach, it will be increasingly popular in the logistics （物流）industry,” said Miao Qianjun, secretary-general of the navigation services association. “Ships, for example, can use it to position themselves while sailing across oceans to European countries, no longer limited to Southeast Asian regions in the near future.”

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    Wolves strike fear into the hearts of many species, humans included. Our fear of them has brought them to the edge of dying out, as we have cruelly killed them as competitors and trouble-makers. But researchers are discovering that the very fear they put into prey（被捕食者）species is exactly what helps make ecosystems（生态）healthy.

    Yellowstone National Park is a typical example of just how wolves can help repair an ecosystem. An October 2018 study analyzed 40 years of research on large animals inside the park.

    "Yellowstone has benefited from the reintroduction of wolves in ways that we did not anticipate, especially the complexity of biological interactions（互动） in the park," explained Mark Boyce, a professor in the Department of Biological Sciences." We were really surprised at that and we'd never have seen these responses if the park hadn't adopted ecological-process management—allowing natural ecological processes to take place with least human intervention."

    After the wolves were re-introduced at Yellowstone, willow and cottonwood trees increased in number. The population of bears and bison also rose and what was once a ruling deer-wolf interaction is now more diverse.

    To learn more about just how wolves are beneficial, a short documentary from Quest explains how the presence of wolves influences the behavior of deer, which eventually makes entire ecosystems more biologically diverse and healthy. In this documentary, biologist Aaron Wirsing explored why wolves and other top predators （捕食者）were needed for diverse ecosystems to develop. Using a simple video camera, Wirsing is gaining a unique view point on predator-prey relationships and changing the way we think about wolves.

    The research is one more piece of evidence for why protecting these top predators is important not just for wolves as a species, but for hundreds of species at every level of an ecosystem. The fear they bring along may be the very angle that helps save them from dying out.