The effects of coffee consumption on health have long been a subject of conflict and uncertainty.Since the 1980s,some have spoken out against coffee as harmful to health,while others have welcomed coffee for its supposed benefits to health.

    According to a scientific report,mild coffee consumption,three to five cups per day,can he taken as a healthy dietary pattern,along with other healthful behaviors.The report also says that coffee consumption helps reduce the risk of heart disease and it protects against Parkinson's disease.

    According to Dr.Donald Hensrud of Mayo Clinic,high consumption of coffee has health risks.Dr.Hensrud mentions the dangers of high coffee consumption for people with a certain illness that slows the breakdown of caffeine in the body.Some studies said that drinking two or more cups of coffee daily can actually increase the risk of heart disease in these people.

    According to conclusions from a recent study led by Dr.Gregory Marcus,a doctor from the University of California San Francisco,daily moderate consumption of caffeine,less than 4 cups,is not associated with these issues.

    Until the scientific community reaches a general agreement on the effects of coffee consumption on human health,it will be up to the individual to decide whether the benefits of drinking coffee are greater than the risks.

    When informed of these possible health benefits and harms of drinking coffee,Harwood,a high school student stated,"Even though there might be some negative effects of drinking coffee,for the most part,coffee drinking sounds good for health.Not to mention I need coffee to stay awake."

    Science fiction writers create imaginary worlds. The way things work in your imaginary worlds will be based on actual science. So it's important for you to be familiar with the scientific principles and inventions that are related to your creation. For example, if you're writing about human living on a planet with zero gravity, then you need to know the effects of zero gravity on the human body.

    Then you have to figure out the exact rules of your imaginary worlds. And you have to follow them. If humans are able to breathe underwater in Chapter 1, your character can't drown in a swimming pool in Chapter 3. The issue here is maintaining your readers' trust. That means the readers are willing to pretend along with you. If you start out with an ordinary detective novel and then throw in someone breathing underwater in the 6th chapter, you will pull the readers out of their imagination. The same thing happens if you change the rules halfway.

    Part of your preparation work for the novel is to map out its worlds in great detail. You should decide the following issues: the history of the world, the geography, what possibilities it offers, how everything works in this new reality, and how all of these factors affect the way your characters think, feel, and react to things. You don't have to tell your readers all the rules in the first chapter. But you have to let readers know enough to understand what's going on. This also allows you to work out logical problems and contradictions before you start writing.

    When you are writing, remember to make it feel real. You are inviting readers to visit a new world. They will want to be able to see, hear, feel, smell, and even taste what it's like. Whether your novel is about a world without disease or an undiscovered planet, help your readers feel like they're actually there.

    It's said that you don't know a man until you walk a mile in his shoes. And you also don't know what it's like for older people to travel until you accompany one on a trip.

    After flying with my elderly father from Washington, D.C. to L.A. in July, I began to realize that a companion has important tasks that can make a journey easier for older people. I booked nonstop tickets on JetBlue to avoid tiring, confusing connections, and we flew directly into small, manageable Long Beach Airport. Even though my father could walk, I arranged with the airline for wheelchair assistance, which meant we got on board first.

    When I took him back to the airport for his return flight to Washington, I got permission from JetBlue to wait with him at the gate instead of saying goodbye at the security checkpoint. I wished he'd had a first-class seat and access to a comfortable airline club. Better yet, I wish I had flown with him both ways. As I watched the attendant wheel him to the lift that took him from the tarmac（飞机跑道）to the plane, I felt like an anxious mom sending her child to school for the first time.

    Things can go awry on a plane trip. And then there is the horrifying story about Joe and Margie. When they landed at Dallas-Fort Worth International Airport, a wheelchair attendant met them to help with a connection. But somehow Margie, who had Alzheimer's disease, disappeared.

    I didn't need to worry about my father wandering away; at 82, his mind was sharper than mine. But his hearing was poor, so I worried about what would happen if he missed an important announcement. Fortunately, everything went just fine. Careful planning made the trip successful.

    Next time I travel with a senior, I'll know better. I hope there will be a next time.

    On the day the tornado hit, there was no indication severe weather was on its way—the sky was blue and the sun had been out. The first alert my husband, Jimmy, 67, and I, 65, got came around 9 p.m., from some scrolling text on the TV Jimmy was watching. He ran upstairs to find me in our third-floor bedroom, and we changed the channel from the presidential primary debate I had been watching to our local Pensacola, Florida, station.

    No sooner had we found coverage of the tornado than it was on top of us. Suddenly, the bones of the house shook, the power went out, and the wind began to roar through blown-out windows. We had three flights of steps to navigate to the relative safety of the first floor, where a closet fixed underneath a brick staircase might be the firmest place to wait things out. Everything around rattling, we struggled forward, uncertain whether we would make it.

    As we reached the last flight of steps, our front door blew out. Shards of glass flew everywhere. A three-foot-long tree branch whipped, missing us by inches.

    By the time I reached the closet, the tornado had been over us for about a minute. Jimmy pushed me down to the closet floor, but the wind kept him outside. I grasped his arm as the tornado constantly sucked the door open and tried to bring him with it. My knees and scalp were full of glass, but I felt no pain. If I had let go, Jimmy would have flown right out the back of the house and into the bay. Then everything stopped. In those first quiet moments, I couldn't believe it was over.

    The storm lasted four minutes. Four of the twelve town houses in our unit were completely destroyed. Of the houses left standing, ours suffered the most damage. Amazingly, none of us were severely injured.

    There is more of a connection between food and culture than you may think. On an individual level, we grow up eating the food of our culture. It becomes a part of who we are. Many associate food from our childhood with warm feelings and good memories and it ties us to our families, holding a special and personal value for us. Food from our family often becomes the comfort food we seek as adults in times of frustration and stress.

    On a large scale, traditional food is an important part of culture. It also operates as an expression of culture identity. Immigrants bring it wherever they go, and it is a symbol of pride for their culture and means of coping with homesickness.

    Many immigrants open their own restaurants and serve traditional dishes. However, the food does not remain exactly the same. Some materials needed to make traditional dishes may not be readily available, so the taste and flavor can be different from what they would prepare in their home countries. Additionally, immigrants do not only sell dishes to people from the same countries as them, but to people from different countries. Therefore, they have to make small changes about the original dishes to cater to a wider range of customers. Those changes can create new flavors that still keep the cultural significance of the dishes.

    We should embrace our heritage（传统）through our culture's food but also become more informed about other cultures by trying their food. It is important to remember that each dish has a special place in the culture to which it belongs, and is special to those who prepare it. Food is a window into culture, and it should be treated as such.

Isatou Ceesay was born in 1972 in a small village in Gambia, Africa. As a teenager, Ceesay was forced to drop out of school because of poverty. She carried some goods with many girls like her to sell in the market to raise herself At that time, the plastic bags, being strong and light, became popular in Gambia. The problem was that people did not reuse the bags and simply threw them behind their homes. Over time, the houses were surrounded by trash.

Ceesay lived in such an environment for many years. She kept learning from the surrounding environment and planned to take action to change. In 1997, she started a recycling movement called One Plastic Bag in Gambia. She educated women in Gambia to recycle plastic waste into income for themselves. In the beginning, the movement had a mission to educate their village colleagues about the need to reuse garbage and recycle plastic waste, rather than letting the garbage increase behind their homes.

Over time, the movement became big and able to support and provide income for women around. It was also able to greatly reduce plastic waste in Gambia. But the work of collecting trash turned to be taxing. During the rainy season, plastic waste became wet and difficult to take, and after that it still took patience to dry it before it could be processed.

Ceesay said, "As a habit, people are used to pouring their garbage behind their houses, and because it is not visible, they forget it. But the bad effects again knock on your door very quickly — dirty air, various diseases and so on. Of course, if one man's house is clean but his neighbor's is not, then the man is also not healthy."

For 17 years, Ceesay has contributed to one of the most important problems about the plastic waste. In 2012, she got the TIAW Difference Maker Award in Washington, DC, United States. Her story was written into a book, which inspires many others to join or become makers of change in their own communities.