Many people love to drink Coke. But they don't know it has many other uses (用途).

You can use it to wash your hands and your clothes. When you wash something, you can put some Coke into the water. Then you can wash it well.

Put some Coke on the meat when you cook it. And you can cook chicken with Coke, too. It's very delicious and it's my favourite food.

Coke is good for girls. Use it on your hair and your face, and you will find they are very smooth with Coke's help.

Your flowers may like to drink Coke, too. If you give some Coke to your flowers, they will be strong and nice.

So give Coke a try. If something can't do it, Coke can.

“Mum, there’s something I have to tell you.” Ula’s eyes were wide with distress(苦恼)as she spoke to me.

“What is it, sweetie?” I reached over and pushed her hair behind her ear.

“I know we weren’t supposed to do it,” she began, before telling me she’d been playing with one of her friends.

The friend had wanted to practise the CPR(心肺复苏术)they had learned in swimming class on her.

Ula started to cry. “I told her I didn’t want to do it. But she really wanted to, and I didn’t want to make her mad.” I sent a note to the other girl’s parents so they could talk to their daughter.

But something Ula had said worried me. Ula knew that what the other kid wanted to do wasn’t right. But she didn’t stand up for herself, and that frightened me.

For the rest of the day, Ula and I talked about boundaries that help us, when necessary, to deal with our needs before the needs of others. Boundaries can protect us from being overworked; they can protect our belongings(物品)or health. Sometimes, they simply buy us the time to be alone or with a friend, to be away from the chaos(混乱)of life, to rest and to enjoy ourselves.

Ula and I imagined different friends in different situations, crying and threatening(威胁)to tell on(告发)her, and I taught her to say “no”, even in these situations. I told her that I trust her to do what is right, no matter how angry that may make someone. And I told her that I will always be there to back her up.

Now, Ula realizes that it doesn’t matter if we are 7 or 47: Learning to protect our personal boundaries is a never-ending story, filled with errors(错误) in judgment(判断）. With each day of our lives, we have to learn where the line is. We have to decide whether and how, on that day, we will defend(捍卫)it.

I stayed with Ula until she said, “You need to go eat.” And in that moment, she reminded me of the next great lesson in boundaries: It is not enough to look out for(留意) our own limits(界限)-we must also honor(尊重)them in others.

In high schools, as subjects increase, maybe you can’t fully understand what you are learning. 【小题1】 This process is called self-reflection (反省).

Self-reflection begins with slowing down and calming yourself, including calming your mind. Then you can give your brain a chance to think about what it has already received. Some people prefer to do self-reflection only in their minds. 【小题2】 Either of the methods works. It depends on your own personal learning ability.

How do you learn to do self-reflection? 【小题3】 First, choose a proper time to do it. Every night before going to bed, you can do self-reflection over what you have learned in the daytime. When you complete a unit of study, you can do self-reflection by drawing a mind map. Secondly, find a quiet place and take out your reflection diary. Write down some notes on the new things that you have just learned. And connect them with the previous (以前的) knowledge. As a result, you can understand them better. 【小题4】 This will help you remember to look for answers when you are working on the same topic next time.

Successful students always know self-reflection is important. If you have never taken the time to do it, try it now!