The researchers created a long-termstudy in which they invited families in 16 school districts in central Pennsylvania to participate. In each family, a teenager, a younger sibling, their mother and their father were interviewed at home and then asked about their activities and self-worth five times over a period of seven years.

    The study authors were surprised to discover that when fathers spent more time alone with their teenagers, the kids reported they felt better about themselves. Something about the father's role in the family seemed to improve self-esteem among the teenagers in the study, said study author Susan McHale, a professor of human development at Pennsylvania State University.

  “Time spent with Dad often involves joking, teasing and other playful interactions. Fathers, as compared to mothers, were more involved in leisure activities and had more friend-like interactions with their children, which is crucial for youth social development,” the study showed.

    But Marta Flaum, a psychologist in Chappaqua , New York, said, “How these findings reflect the real world is areal question. The sample in the study is so small and so unrepresentative of more families in the country today that I'm not sure how much we cangeneralizing from it. In my community, in Westchester County, I don't see parents and teenagers spending much time together at all. Parents are often working so hard and have less time to be together with their kids.”

    However, Flaum encourages parents to make time for their kids no matter how much work they have to do. “Research like this reminds us of how important it is. The time we have with themis so short, ” she said.

    In my living room, there is a plaque (匾) that advises me to “Bloom (开花) where you are planted.” It reminds me of Dorothy. I got to know Dorothy in the early 1980s, when I was teaching Early Childhood Development through a program with Union College in Barbourville, Kentucky. The job responsibilities required occasional visits to the classroom of each teacher in the program. Dorothy stands out in my memory as one who “bloomed” in her remote area.

    Dorothy taught in a school In Harlan County, Kentucky, Appalachian Mountain area. To get to her school from the town of Harlan, I followed a road winding around the mountain. In the eight-mile journey, I crossed the same railroad track five times, giving the possibility of getting caught by the same train five times. Rather than feeling excited by this drive through the mountains, I found it depressing. The poverty level was shocking and the small shabby houses gave me the greatest feeling of hopelessness.

    From the moment of my arrival at the little school, all gloom (忧郁) disappeared. Upon arriving at Dorothy's classroom. I was greeted with smiling faces and treated like a queen. The children had been prepared to show me their latest projects. Dorothy told me with a big smile that they were serving poke greens salad and cornbread for “dinner” (lunch). In case you don't know, poke greens are a weed-type plant that grows wild, especially on poor ground.

    Dorothy never ran out of reports of exciting activities of her students. Her enthusiasm never cooled down. When it came time to sit for the testing and interviewing required to receive her Child Development Associate Certification, Dorothy was ready. She came to the assessment and passed in all areas. Afterward, she invited me to the one-and-only steak house in the area to celebrate her victory, as if she had received her Ph. D. degree. After the meal, she placed a little box containing an old pen in my hand. She said it was a family heirloom (传家宝), but to me it is a treasured symbol of appreciation and pride that cannot be matched with things.  (360 words)

    There exist cruel wars, fighting and sadness in the world today, so it's not only necessary, but also essential to have a good sense of humor just to help us go through difficult times in out lives. Putting a smile on someone's face when you know they are feeling depressed, as the saying goes, makes me feel good and warms my heart.

    How would you feel if you could not joke around with wife, husband, child, co-worker, neighbor, close friend, or even just someone that you are standing in line with at your corner store? I am always saying things that make others smile or laugh, even if I don't know the person I'm joking around with. My Grandma always found humor in everything she did, even if it was the hardest job anyone could imagine. This not only relieves stress in any situation, but also is a common manner to speak to others that are around you.

    I know of a few people that don't have a funny bone in their bodies, as they say. Everyone around them could be rolling on the floor after hearing a great joke and they would sit there without the slightest smile on their faces. They don't get the joke that makes others laugh. I am, busting a gut while they just sit there, looking at me as if I were from outer space. How can people not get a really funny joke?

    Laughing is essential to keep your stress levels under control. Without humor, we would find ourselves with a lot of psychological problems, or on a lot of medications to keep us from going crazy. There is too much sadness and bring a little light into our lives.

    Therefore, I believe our best medicine is to get together and tell some jokes and have some fun laughing together.

    Derek Rabclo is not the only surfer to conquer Hawaii' s famous Pipeline big wave break, but while all others use their sight to do it, this young professional surfer must rely only on his other senses. That's because he is completely blind.

    When Derek was born, over 24 years ago, he got his name from Derek Ho, the first Hawaiian surfing world champion. A surfing enthusiast himself, Emesto dreamed that his son would share the talent of his uncle, a professional surfer. Unfortunately, Derek was born completely blind, but this didn't slop his family from believing lhat he could do anything he wanted, even if that meant becoming a surfer.

    At age 2, Derek received a bodyboard and the beaches of Guarapari, Brazil, became his backyard. He was always comfortable in the water and surfing was in his blood, but he didn't actually try riding a wave until he turned 17, when his father bought him a surfboard. His father taught him the basics and encouraged him to keep practicing, but after successfully standing up on the surfboard, Derek knew he needed to become much better if he was going to achieve Emesto's dream and become a professional surfer. So he joined the Praia do Moroo surf school, where he studied under coach Fabio Maru.

    Standing up on a surfboard and conquering small waves is one thing, while gathering the courage to take on Hawaii's board-breaking Pipeline is another. But that's exactly what Derek Rabelo set out to do just months after learning how to surf. Everyone told him it was too dangerous, but he felt he could do it. And he did, earning the praise of famous professional surfers like Kelly Slater and Mick Fanning. Now 24, Rabelo has been surfing the Pipeline every winter since.

C

    There's a new frontier in 3D printing that's beginning to come into focus: food. Recent development has made possible machines that print, cook, and serve foods on a mass scale. And the industry isn't stopping there.

Food production

    With a 3D printer, a cook can print complicated chocolate sculptures and beautiful pieces for decoration on a wedding cake. Not everybody can do that — it takes years of experience, but a printer makes it easy. A restaurant in Spain uses a Foodini to "re-create forms and pieces" of food that are "exactly the same," freeing cooks to complete other tasks. In another restaurant, all of the dishes and desserts it serves are 3D-printed, rather than farm to table.

Sustainability(可持续性）

    The global population is expected to grow to 9.6 billion by 2050, and some analysts estimate that food production will need to be raised by 50 percent to maintain current levels. Sustainability is becoming a necessity. 3D food printing could probably contribute to the solution. Some experts believe printers could use hydrocolloids (水解胶体) from plentiful renewables like algae(藻类) and grass to replace the familiar ingredients(烹饪原料). 3D printing can reduce fuel use and emissions. Grocery stores of the future might stock "food" that lasts years on end, freeing up shelf space and reducing transportation and storage requirements.

Nutrition

    Future 3D food printers could make processed food healthier. Hod Lipson, a professor at Columbia University, said, "Food printing could allow consumers to print food with customized nutritional content, like vitamins. So instead of eating a piece of yesterday's bread from the supermarket, you'd eat something baked just for you on demand."

Challenges

    Despite recent advancements in 3D food printing, the industry has many challenges to overcome. Currently, most ingredients must be changed to a paste(糊状物) before a printer can use them, and the printing process is quite time-consuming, because ingredients interact with each other in very complex ways. On top of that, most of the 3D food printers now are restricted to dry ingredients, because meat and milk products may easily go bad. Some experts are skeptical about 3D food printers, believing they are better suited for fast food restaurants than homes and high-end restaurants.

    Growing up, I wanted to be just like my mom. She was kind. People always seemed to feel comfortable in her presence. For years, she was a volunteer in our community. I loved going to the local nursing home with her where she taught a ceramic class.

    On one summer day, Mama told me to get changed and meet her at the car.

I had planned to spend the day at the lake with friends. Why did she have to ruin everything? I imagined the cool lake water. Irritated, I climbed into the car and slammed the door shut. We sat in silence. I was too upset to make conversation.

“Tasha, would you like to know where we are going?” Mama asked calmly.

    “No,” I said.

    “We are going to volunteer at a children's shelter today. I have been there before and I think it would benefit you,” she explained.

    When we reached the shelter, Mama rang the doorbell. Moments later, we were greeted by a woman. She led us to the front room where all of the children were playing. I noticed a baby whose body was scarred with iron marks. I was told it was because she wouldn't stop crying. The majority of the children had noticeable physical scars. Others hid their emotional wounds.

    As I took in my surroundings, I felt a gentle tug on my shirt. I looked down to see a little girl looking up at me. “Hi. You want to play dolls with me?” she asked. I looked over at Mama for reinforcement. She smiled and nodded. I turned back and said, “Sure.” Her tiny hand reached up and held mine, as if to comfort me.

     My mom taught me a valuable lesson that summer. I returned to the shelter with her several times. During those visits, some of the children shared their troubled pasts with me and I learned to be grateful for what I had. Today as I strive to instill (逐渐灌输) these values in my own child, I reflect back to that experience. It was a time that I will never forget.