Humans like to pet animals because polling can improve your relationship with your pet. It can also help you feel more supported and less lonely on days that you’re feeling blue. But how to pet animals? Different animals like different ways.

Dogs like to be petted on their chests (胸口), necks and shoulders. If you are petting a strange dog, you should come near to it slowly, get down to its slowly, and hold out a closed list for it to smell. After the dog smells you and its body appears relaxed, you can slowly and lightly touch around its oars and around its shoulders and chest.

Cats enjoy being petted on their heads, chins (下巴) and necks. When you are going to pet a cat, let it come near to you first. Get down or sit down to be at its level and put your hand out for it to smell. If it wants to be petted, it will push its head into your hand or get close to your body. Use your fingers to lightly scratch (挠) under the cat’s chin, on the top of its head and around its cheeks (脸颊).

Rabbits like to be petted on their heads, shoulders and cheeks. Rabbits are easily afraid of humans. So you’d better come near to them slowly, sit down on the ground and put out your hand for them to smell. If you rabbit comes near to you, use your fingers to lightly pet its head.

Pet birds lightly on the head arid avoid touching other areas. Building crust with birds takes time, so come near to them slowly and watch for body language shoeing that they want to be petted. When you go to pet your bird, put your hand only on its head. You can touch its cheeks and the back of its head.

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I am a professor of sports and exercise so I often deal with nervousness in my research with sports people. Actually, most people experience nervousness at some time or another.

If you are feeling anxious, my advice is to first find the cause or causes. Make a list of those things that are making you nervous and work out which ones you can do something about. Focus all of your efforts on managing the causes that you can control.

Most people cannot tell the difference between controllable (可控制的) and uncontrollable causes, so things they can't control become a big reason for nervousness. Dealing with this is very important if people want to keep a healthy mind.

Simply try to accept the uncontrollable causes of nervousness. You might be worried about the weather on a big day, an accident or an attack on the train, or perhaps just things that other people are doing at work. The results may be very important but there is still no use worrying because you can't control any of these things. Accept that you can't control everything. Once you understand this, it becomes easier not to worry.

If a situation, such as swimming, is causing you to be anxious, try to face it as often as possibly so that you can get used to it.

It can often help to think about yourself doing the thing that makes you nervous—then close your eyes and imagine it going well. Imagine how the flight or job interview is going to happen so that you can get used to it. This will help you understand that the thing you fear most is probably not going to happen.