I still remember the winter of 1933 for a gift which made three girls happy.

Life was hard then, with lots of folks finding themselves penniless. When my shoes got holes, my dad just cut a piece of cardboard to slip inside them.

Maxine, my best friend, and I were in the choir. Then the principal, Mr. Robert announced a gift exchange among all the students. We each pulled a slip of paper with a name on it from a box. “Now don’t tell anyone whose name you got,” Mr. Robert reminded us. “This will be such a surprise!”

Of course, telling us to keep the names we’d picked secret was like asking a dog to stop barking. We figured out every single name. Maxine picked Peter and Barbara’s name was on my slip of paper. When we figured out who had my name, I almost fainted. It was Betsy! Betsy was poorer than the rest of us. My eager little heart sank. I knew I wouldn’t get anything from her.

Maxine and I were walking home that afternoon after choir practice. “What am I goanna do, Maxine, when my name is called? Stand up there looking stupid while everyone is watching me?” Maxine tried her best to make me feel better.

When we reached Maxine’s house, her mother called to us to see what Maxine’s aunt had sent her. A pair of red gloves was out on the table. “Oh,” Maxine cried with delight. “Look at the white snow angels on each of them!” She pulled off her worn brown gloves and slipped her hands into the new ones. “I have never seen anything so beautiful in my whole life,” I sighed. Well, I was happy for Maxine, but the sight of the gloves made me feel even sorrier for myself.

Finally the day for the gift exchange arrived. One name was called and then another. Kids jumped up, laughing happily and calling out to friends as they received their gifts. “Betsy,” Mr Robert called. I saw Betsy stand up hesitantly. Then Maxine stood up!

I caught Maxine’s arm. “You have Peter,” I reminded her. “I traded him,” she whispered as she walked over and handed her gift to Betsy. Betsy carefully unfolded her gift. My eyes popped out, and I think I even said, “Oh no!” out loud.

Maxine’s red snow angel gloves lay in Betsy’s open palms.

“Delores,” Mr Robert called out and my turn come.

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6 . One summer night, a boy felt himself lifted from bed by his father. Dazed with sleep, he saw stars flashing across the heavens. “What is it?” the child whispered. “Shooting stars. They come every year in August.” Decades have passed, but I remember that night still, because I was the fortunate boy whose father believed a new experience was more important than an unbroken night’s sleep.

Some parents like my father have the gift of opening doors for their children. This art of adding dimensions to a child brings the reward: the marvelous moment when the spark bursts into a flame that will burn brightly on its own one day. At a Golf Association tournament, a ten-year-old girl played creditably. “How long have you been interested in golf?” someone asked. “I got it for my ninth birthday,” she said.“ Your father gave you a set of clubs?” “No,” she said, “he gave me golf.”

I have a friend, a psychiatrist, who says there are two types of people: those who think of life as a privilege and those who think of it as a problem. The first type is enthusiastic and energetic. The other type is suspicious and self-centered. And he adds, “Tell me about your childhood and I can tell you which type you are likely to be.”

The real purpose, then, of trying to open doors for children is to build eager and outgoing attitudes, which is the most valuable legacy we can pass on to the next generation. But why don’t we work harder at it? Probably because sometimes we don’t have the awareness or the selflessness or the energy. And yet, for those of us who care what becomes of our children, the challenge is always there but the opportunities also come repeatedly. Many years have passed since that night. And next year, when August comes with its shooting stars, my son will be seven.

7 . Feel exhausted after a party? Rather see one close friend than a group of acquaintances? Enjoy your own company? In our world, that makes you an introvert (内向的人). However, there’s another possible explanation — vertical attachment. If you are closer to your parents and family members than to your peers, you are vertically attached, which means you rely more on family for comfort.

If you are closer to your peers, then you are peer attached. We live in a peer-oriented world. We believe that having lots of friends means that we are well-adjusted. We put our kids in playgroups and daycare for peer interaction. We expect teenagers to want to hang out with their friends, thinking it is the natural way of things.

Result? Generations often feel worlds apart. We use different language, dress, and technology apps. Even if multiple generations are invited to the same party, the kids go to the basement playroom while the parents stay upstairs.

Vertically-attached individuals can feel out of place in this context, demonstrating the traces of introversion. Will they be exhausted after a party with same-aged acquaintances? Absolutely. Would they rather spend time with one close friend? Sure. Do they enjoy alone time? Yes, more than they enjoy time fitting in with peers.

It’s normal that many people need alone time to recharge. However, vertically-attached people often label themselves as introverted. They feel insecure that others have more friends and live richer lives. They claim that their family attachments arise from their loved ones being stuck with them.

If you feel these insecurities, know that there is nothing wrong with you, and you are not missing out on anything. Your attachment style is just different from the culture where you live. Have confidence in the strength of the relationships you have, whether it is with a mom who feels more like a best friend, or a grandmother with whom you can share anything. They are meaningful, enriching relationships, even if they look different from the cultural norm.

8 . At the age of 12, I withdrew into my bedroom with my guitar. I had neither musical talent — many_______music lessons had proved that — nor musical training. My fingers ached as I tried to press down on the strings without making them buzz (发出嗡嗡声). _______, I worked my way through 2-, 3- and even 5-chord (和旋) songs and discovered the _______ thrills of these musical notes. No one _______ me to do this. I did this myself and of my own free will for a week, and the sense of happiness－ true happiness _______ in absorption in something － has _______ me. Fifty years later, that week’s self-directed practice became a model and _______ for almost every meaningful thing I have done since. It makes me understand the _______ between achievement and accomplishment.

The world favors achievement while _______ accomplishment. The former is the completion of the task imposed (强加) from the outside — the ________ being a path to the next task. The latter is the end point of an activity we have chosen, whose bonus is the sudden ________ of happiness.

The seeking of accomplishment always ________ people. I learned so long ago in that ________ week that simply lifting one finger from the guitar’s C chord, you should get the most moving ________ in tune. I didn’t know then it was a major 7th chord, a favorite of some masters’. I just ________ accomplishment. That’s real human “achievement”.

10 . Healthy human skin is covered with bacteria (细菌) that are quick to settle in an open wound. To prevent these organisms from spreading through the body, which can permanently injure or kill a person, the infected wound may need to be cleaned and treated with antibiotics. Medical professionals typically identify infections by unwrapping and observing a wound or by swabbing (用拭子擦拭) it and conducting a laboratory test. But removing a wound dressing can slow down the healing process. Plus, observations are subjective, while swab tests take time and require that a patient be physically present.

To address these issues, some research teams are developing devices that sit under bandages and continuously monitor indirect signs of infection, such as changes in wound temperature or acidity. And scientists at the National University of Singapore have now created an even more direct infection sensor.

This sensor can detect an enzyme (酶) called DNase. The enzyme acts as a reliable infection indicator because disease-causing bacteria produce it in large amounts inside wounds, whereas bacteria on healthy skin do not—so testing for the substance reduces the chance of a false positive result. Furthermore, DNase builds up before other infection signs appear. The new alert system, nicknamed the“wireless infection detection on wounds” (WINDOW) sensor, was detailed in Science Advances.

WINDOWs enzyme-sensing parts rely on a material called DNAgel. There searchers developed a particular kind of DNAgel that remains stable in watery environments, such as the human body, but begins to break down in the presence of DNase. They connected this gel (凝胶) to a chip that senses when the gel responds by sending a signal to a smartphone.

Thus far, the team has exposed the DNAgel to wound swabs from 18 people’s wounds to see how much the material degraded in the presence of the bacteria. There searchers also used the device on six living lab mice whose wounds were exposed to the same bacterial species, and it successfully detected infections.