题目内容：

Some people think if you are happy, you are blind to reality. But when we research it, happiness actually raises every single business and educational outcome for the brain. How did we miss this? Why do we have these social misunderstandings about happiness? Because we assumed you were average. When we study people, scientists are often interested in what the average is.

Many people think happiness is genetic. That’s only half the story, because the average person does not fight their genes. When we stop studying the average and begin researching positive outliers —people who are above average for a positive aspect like optimism or intelligence —a wildly different picture appears. Our daily decisions and habits have a huge impact upon both our levels of happiness and success.

Scientifically, happiness is a choice. It is a choice about where your single processor brain will devote its limited resources as you process the world. If you scan for the negative first, your brain really has no resources left over to see the things you are grateful for or the meaning embedded(嵌入) in your work. But if you scan the world for the positive, you start to acquire an amazing advantage.

I wrote the cover story for the Harvard Business Review magazine on “Happiness Leads to Profits.” Based on my article called “Positive Intelligence” and my research in The Happiness Advantage, I summarized our researched conclusion: the single greatest advantage in the modern economy is a happy and busy workforce.

A decade of research in the business world proves that happiness raises nearly every business and educational outcome: increasing sales by 37%, productivity by 31%, and accuracy on tasks by 19%, as well as a number of health and quality-of-life improvements.

1.The underlined word “this” in the first paragraph refers to        .

A. the fact that people are happy

B. the connection between happiness and educational outcome

C. the fact that people often misunderstand happiness

D. the fact that most people are average

2.What can we learn from the passage?

A. Scientists are only interested in what the average is.

B. You can choose to be happy or not.

C. The average are not happy at all.

D. Our decisions and habits have nothing to do with happiness.

3.Why does the writer mention his articles and research?

A. To advertise himself.

B. To arouse the readers’ interest.

C. To support his point about happiness.

D. To attract the readers to read his articles.

4.What is the author’s purpose of writing this article?

A. To explain what is happiness.

B. To describe the misunderstandings about happiness.

C. To show people the importance of happiness.

D. To make the point that happiness promotes business and educational outcome.