Every man wants his son to be somewhat of a clone, not in features but in footsteps. As he grows you also age, and your ambitions become more unachievable. You begin to realize that your boy, in your footsteps, could probably accomplish what you hoped for. But footsteps can be muddied and they can go off in different directions.

    My son Jody has hated school since day one in kindergarten. Science projects waited until the last moment. Book reports weren't written until the final threat.

    I've been a newspaperman all my adult life. My daughter is a university graduate working toward her master's degree in English. But Jody? When he entered the tenth grade he became a “vo-tech” student(技校学生). They're called “motorheads” by the rest of the student body.

    When a secretary in my office first called him “motorhead”, I was shocked. “Hey, he's a good kid,” I wanted to say. “And smart, really.”

    I learned later that motorheads are, indeed, different. They usually have dirty hands and wear dirty work clothes. And they don't often make school honor rolls(光荣榜).

    But being the parent of a motorhead is itself an experience in education. We who labor in clean shirts in offices don't have the abilities that motorheads have. I began to learn this when I had my car crashed. The cost to repair it was estimated at $800. “Hey, I can fix it,” said Jody. I doubted it, but let him go ahead, for I had nothing to lose.

    My son ,with other motorheads, fixed the car. They got parts from a junkyard, and ability from vo-tech classes. The lost was $25 instead of $800.

    Since that first repair job, a broken air-conditioner, a non-functioning washer and a non-toasting toaster have been fixed. Neighbors and co-workers trust their car repairs to him.

    These kids are happiest when doing repairs. They joke and laugh and are living in their own relaxed world. And their minds are bright despite their dirty hands and clothes.

    I have learned a lot from my motorhead: publishers need printers, engineers need mechanics, and architects need builders. Most important, I have learned that fathers don't need clones in footsteps or anywhere else.

    My son may never make the school honor roll. But he made mine.

    Have you been told you have penicillin allergy? Did your parents tell you that you had a reaction as an infant or child, so you should never take it again? Has it been so long since you had a reaction to penicillin that you don't remember what happened? If you fit any of these descriptions or are just not sure if you have penicillin allergy, there's good news for you: Chances are, you probably don't have it.

    Between 10 to 20 percent of Americans believe they have a penicillin allergy, but a recent study at Mayo Clinic found that only 10 percent of those people are truly penicillin allergic. In other words, 9 out of 10 people who think they have penicillin allergy are avoiding it for no reason. Even in people with documented allergy to penicillin, only about 20 percent are still allergic 10 years after their initial allergic reaction. It's not necessarily a permanent condition.

    Why is this important? Aren't there many other antibiotics you can use if you have penicillin allergy? Penicillin has been around since 1928. Penicillin and its related medicines include amoxicillin, methicillin and amoxicillin-clavulnate. These medicines are highly effective treatments for many bacterial infections, such as strep throat and ear infections. Of course, there are alternative antibiotics, but these are often much more expensive and carry a higher risk of side effects. Typically, these alternative antibiotics are broad-spectrum, meaning they fight many types of bacteria, both good and bad. That can lead to development of drug-resistant bacteria, or deadly “superbugs”. This increases the risk for all of us in the future of not having an effective antibiotic to treat our infection.

    How do you find out if you have penicillin allergy? Board-certified allergists can test you. First, the allergist will get a history from you about your possible allergy. Typical questions include: How long ago did you have the reaction? What type of reaction occurred, and how soon after you took the penicillin did the reaction appear? The testing is done on the forearm by pricking the skin with a needle. If the results are negative and there is no reaction, penicillin will be injected in the skin. These tests are not painful, and results are available in 15 minutes. A positive reaction may lead to some swelling and itching where the test was placed, which usually goes away within an hour.

    In very rare cases, an allergic reaction occurs. This can include hives, swelling, wheezing and/or difficulty breathing. The allergist is trained to treat this rare condition quickly if it happens. If all skin testing is negative, you may be given an oral dose of penicillin in the office. The oral drug challenge is used to verify that you don't have penicillin allergy. Usually, you'll be observed in the office for 30 minutes to make sure you have no problems.

    If you find out you don't have a penicillin allergy, notify your physicians that it's now safe for you to take penicillin. They can take “penicillin allergy” off your chart for good!

    I was selfish as a teenager. I usually spent my time thinking about myself and taking care of my own needs. I let my older brother do most of the work around the house until he left for college. I let my mom and dad worry about our bills and problems while I read books, played, and lost myself in my own imagination. This didn't change even when I went to college either. I studied hard but only to make my own life better. Even when I started to explore my faith, it was only to increase my own happiness.

    I married after graduation and decided to start a family. Of course, I had no idea what hard knocks reality had in store for my selfish soul. Soon I found myself unemployed, deeply in debt, and with a new baby on the way. l found out that life has little sympathy for spoiled people. In fact, all of the struggles I was going through were beating the selfishness slowly out of me.

    Still, I didn't give up on happiness. I knew that there must be a way to find it. I finally realized, however, that it had to include more than just my own needs, wants, and desires. The answer began to make itself clear one night shortly after my baby boy was born. I got a bottle and held him in my arms. As I was feeding him I looked down and saw his big, innocent, trusting eyes. I smiled and talked to him. Then he smiled and I could feel my heart growing, expanding with love. I felt such peace and joy. At that moment I had a hint of the truth: it is by growing our hearts with love that we find our happiness.

    Carolyn Arends wrote: "The more people you let into your heart, the bigger your heart gets. The more love you get, the more love you have to give. It just keeps growing." So, keep loving, keep living and keep caring. Keep growing your heart today, tomorrow, and always.

    When David Edwards founded the oPhone, he hoped scent (嗅觉的) messages would become the next big thing in the digitization of our online lives.

    The device looked like a high-tech cruet set (调味瓶), and allowed a friend with an iPhone app to send you scent messages alongside photos. Send a picture of your dinner, tag it with four different tones, and whoever is on the receiving end can sniff it from the vase-like tubes of the oPhone.

    The oPhone didn't take off, and the company has now shifted focus to a “scent speaker” called the Cyrano, which similarly uses a range of scent capsules to emit “play lists” of smells.

    Compared to our real world interactions, our online lives are lacking in scent. Our digital culture, so soaked in visual and aural stimuli, is odorless (没有气味的). So why didn't his marriage of smell and picture messaging excite more interest?

    From a technical point of view, smell is simply harder to mass communicate than sounds and pictures. “There are two main technological obstacles to making smell transmissible by digital means,” explains biophysicist and author of Perfumes: The A -Z guide, Dr Luca Turin.

    “First, there are no odor 'primaries' like RGB or CMYK. Second, it has proved impossible to stimulate the olfactory epithelium (上皮组织) directly by any means tried so far. This means that it is currently impossible to induce a sensation of smell without there being an actual chemical in the inhaled air (吸入的空气).”

    “The more we're plugged into the virtual world, the more we deeply appreciate the contrast-moments in our human, experience,” says designer and olfactory artist Mindy Yang.

    “Intuitively, we realize that we are starved of certain sensations. With the rise of digital culture, society has become more interested in the missing sense-c-what we smell.”

    This interest in scent isn't only happening within the worlds of perfume and fashion. Over the past few years a number of cultural projects have set out to focus on the power of sensory experiences, from the use of a smell map, to the Tate Sensorium, which in 2015 let users experience visual art alongside smells, tastes and sounds.

    Whether it's devices like the oPhone that try to introduce scent into digital messaging, organizations are growingly aware of our culture's desire for sensory experiences. In a time of virtual reality and scentless social networks, it's perhaps no wonder that we as a culture have such a desire for something that instinctively feels real and authentic-even if it was made in a lab.

    Is it wrong—either grammatically or in terms of style—to mix the simple past tense with the past perfect in one sentence? To give an example, the following seems a bit heavy and awkward to me: "There had been a time when she had been happier.' I prefer: 'There had been a time when she was happier.' Any thoughts?

—ALEX

I think the second version is the correct one—it's shorter and clearer. Rather than focusing on tenses, focus on the clean, short sentence. If something seems heavy and awkward to you, the writer—then it probably is. Always short sentences.

—DIANA

    I have constructed texts for a range of children's picture books all based on working profession: bus driver, postman, footballer, cleaner, teacher, policeman to list a few. I've listed about thirty professions so far. I thought of titling them as Mr Bus Driver, Mr Postman and so on. Would I be infringing (侵权) the Mr Men titles if I did or should I think of something else?

—RAJIV

    The Mr Men stories are based on characteristics, not on jobs—Mr Lazy, Mr Noisy, etc—so they bear no relation to your projects. However, you will come under fire from gender equality supporters—every job you list could equally be done by a woman. No teacher and few parents would find work useful if it implies that all professions are open only to men. I advise you to look at modern children's books in a library or bookshop.

—DIANA

    Going back to school can be an anxious time for many students. But one institution in Texas is doing its part to make sure middle schoolers are returning refreshed and inspired to learn.

    Through a process called the "bathroom inspiration project," teachers and administrators at Warren Middle School, spent their summer beautifying the school's restrooms by painting motivational murals (壁画) on each of the stalls (小隔间).Forming messages like "Your mistakes don't define you" and "Scatter (撒播) kindness," the brightly colored words are exactly what a young student needs to see when having a rough day-or any school day for that matter. And now that classes are officially in session, people are already noticing a positive impact.

    Since posting photos of upgrades to the school in July, Principal Joshua Garcia says that the alterations have aroused a great response.

    "Students have been talking about the murals from the moment the pictures had been posted. Some even took the time to find a reason to come up to the campus to see the murals," he says. "I think what makes this small little action so valuable is that it has set the tone for our campus."

    And not only is that important to students, parents, and fellow staff, but it is also vital for the school's new principal, who is trying to gain the trust of the community during a time in which trust is so necessary for schools.

    "Being new to the campus, I think the parents were able to see how much I value their children and have their best interest at heart," Garcia continues. "I have had many parents tell me how they can just feel a difference in the campus climate and how much they are enjoying seeing their children wanting to come here. These murals have put trust back in the campus and its teachers, and by doing so we are able to build a culture in which our students want to be here and learn."