Whenever the word “hero” comes to me, I immediately think of three Hs: honorable, hardworking, and happy. When I think more about this word, I picture someone who has accomplished good things for people and tries to do the right thing Hattie Elizabeth Alexander is one person whom I find to be very heroic.

    Hattie was born in Baltimore, Maryland on April 5, 1901. During her time at College she earned her Bachelor's Degree in Bacteriology and Physiology. These were just the first steps towards what she was finally going to be remembered for. After college Hattie attended Johns Hopkins School of Medicine and received her medical degree.

    After her education, she pursued her career, and after much time and hard work, she drastically reduced the number of infants(幼儿) dying from meningitis(脑膜炎). Hattie was very dedicated to her work and helped at as many locations as she could. Spending substantial(大量的) time in the laboratory, Hattie successfully developed a cure against the disease, which decreased the death rate to 20 percent. At the same time, she was also a teacher working with Columbia University.

    She was a caring lady interested in other people's lives. When she was teaching at Columbia University, other members would talk to her about students that were failing their classes, and somehow Hattie could always find convincing reasons as to why they should not be driven away. Later, Hattie became an instructor in Pediatrics at New York City's Babies Hospital. After many honors, she became the first woman president of the American Pediatric Society in 1965. This was her last major achievement, for soon after, Hattie died of cancer on June 24, 1968.

    Hattie is my hero because her positive attitude and strength helped her accomplish great things for others. She gave them her strength by developing medicines against diseased, which, by doing so, made them stronger. This is what makes Hattie Elizabeth Alexander my hero.

    Staying positive through the cold season could be your best defense against getting ill,a new American study suggests.

    In an experiment that exposed healthy volunteers to a cold or flu virus,researchers found that people with a generally sunny character were less likely to fail ill.The findings,published in the journal Psychosomatic Medicine, build on evidence that a “positive emotional style” can help ward off the common cold and other illness.

    Researchers believe the reasons may be both objective―as in happiness improving immune function―and subjective―as in happy people being less troubled by a sore throat or runny nose.“People with a positive emotional style may have different immune responses to the virus,” explained lead study author Dr Sheldon Cohen of Carnegie Mellon University in Pittsburgh.“And when they do get a cold,they may interpret their illness as being less severe.”

    Cohen and his colleagues has found in a previous study that happier people seemed less likely to catch a cold, but some questions remained as to whether the emotional quality itself had the effect.

    For the new study,the researchers had 193 healthy adults complete standard measures of personality qualities, physicals health,and emotional “style”.Those who tended to be happy,energetic and easy –going were judged as having a positive emotional style,while those who were often unhappy,tense,and hostile had a negative style.

    Afterwards,the researchers gave them nose drops containing either a cold virus or a particular flu virus.Over the next six days,the volunteers reported on any aches,pains,sneezing they had,while the researchers collected objective data.Cohen and his colleagues found that happy people were less likely to develop a cold.

    What's more,when happy folks did develop a cold,their symptoms were less severe than expected based on objective measures.

    On the contrary,people with negative characters were not at increased risk of developing a cold based on objective measures,though they did tend to get down about their symptoms.

    “We find that it's really positive emotions that have the big effect,” Cohen said,“not the negative ones.”

    So can a bad-tempered person fight a cold by deciding to be happy?

    Sitting on the sofa in her family's Michigan home in 2009, looking through the Guinness World Records, 10 year-old Winter Vinecki was surprised to find that the record for the youngest person to complete a marathon on every continent was held by a 27-year-old man. “I can beat that,” she declared. “For Dad. ” And she had every reason to believe she could.

    A natural athlete since the age of 5, Winter had been running together with her mom and uncle, both athletes, and competing in races across the country. Soon, her name was appearing in national competitions. Trophies (奖牌) lined her walls.

    But in 2008, at the age of 9, Winter stopped racing for medals. In May of that year, her father found out he had caught a rare cancer. To raise awareness and funds to fight the disease. Winter started an organization called I earn Winter. Just 10 months after his diagnosis, her father passed away.

    Over the next three years, Winter came first in 20 of the 37 races in which she competed, including four Junior Olympics Cross Country Championships. Along the way, she raised over $ 400,000 to help find a cure for cancer.

    Now 14, Winter is working on her world record to win her cause a place in the Guinness World Records. She recently completed her first marathon in Eugene, Oregon, a race normally limited to runners over 16, finishing in an amazing 3:45:04. “I'm used to racing with adults, and I think it's kind of fun to race past them,” said Winter before the race.

    With six continents to go, Winter has just begun a journey that will take her two years. “Every time I step to a starting line,” Winter says, “I have one thought in mind: keeping my dad's spirit alive.”

    Balancing work and school is not an easy task for me. My first term in college has come and gone and I've had to balance a job there, too. I want to cut one loose. Honestly, many times I thought I wanted to drop out of school and just do my job because I needed the money. For a long while I made myself believe that school was getting in the way of my job and money. Not only was I trying to do work and school, but also I was trying to have a social life. Many times I thought that there were not enough hours in the day but I wasn't managing my time right. Hanging out with friends may have been wonderful but it wasn't putting money in my pocket or knowledge in my brain. Friends would have to wait. I was back on the see-saw (跷跷板) of balancing work and school.

    Scheduling and planning became the key to my success. Setting deadlines and meeting them were important to my college experience. Planning was going well and I felt ready to try and throw a social life back there. I tried to make plans with friends that didn't conflict with my deadlines. That was actually harder than I thought. So once again my social life had to be put on hold (搁置). My friends were very understanding and encouraged me to do my work. The extra motivation really proved helpful in the end. Some friends would joke that I was all work and no play but sometimes that's what has to happen to get work done.

    As the last term came to an end I can say I learned a lot about college life. Planning is necessary for organization. Drawing up a list of all things I had to do at the beginning of the week and actually completing them made me feel good. Not only have I learned something new about organization, but also I acquired a new tool that I can take everywhere with me and use effectively.

    Science Advances published a new research report, saying bees are capable of addition and subtraction (减法)in Arithmetic(算术) learning—using colors in the place of plus and minus symbols.

    It isn't unusual to see the ability to count—or at least distinguish between differing quantities in the animal kingdom—Such ability has been seen in frogs, spiders, and even fish. But solving equations (方程式) using symbols is rare, so far only achieved by famously brainy animals such as chimpanzees. The previous research says the social insects, ants, can count to four and understand the concept of zero and researchers wanted to test the limits of what their tiny brains can do.

    The experiment goes like this. Scientists trained 14 bees to link the colors blue and yellow to addition and subtraction, respectively. They put the bees at the entrance of a Y-shaped maze (迷宫), where they were shown several shapes in either yellow or blue. If the shapes were blue, bees got a reward if they went to the end of the maze with one more blue shape (the other end had one less blue shape); if the shapes were yellow, they got a reward if they went to the end of the maze with one less yellow shape.

    The testing worked the same way: Bees that "subtracted" one shape when they saw yellow, or "added" one shape when they saw blue were considered to have aced the test. The bees got the right answer 63% to 72% of the time, depending on the type of equation and the direction of the right answer—much better than random guesses would allow.

    While the results came from just 14 bees, researchers say the advance is exciting. If a brain about 20,000 times smaller than ours can perform maths using symbols, it could pave the way to novel methods in artificial intelligence (AI) and machine learning. Just don't ask the bees to do your homework anytime soon.