with depression. "The pressures on today's youth are like no other generation, perhaps," Dan Chisholm, an official of WHO, told Reuters.

　　In China, depression among young people is on the rise, Zhu Zhuohong, a psychology professor with the Chinese Academy of Sciences, told Xinhua News Agency. Competition to outperform others, especially in education, can cause a lot of pressure for Chinese youth.

　　Almost 1.2 million Chinese people aged 15 to 24 suffer from depression, according to a report released by British science journal The Lancet in May.

　　Luckily, more and more efforts are being made to deal with this problem. This year's World Health Day, held on April 7, will focus on depression. The day will highlight (强调) the "Depression: let's talk" campaign. The campaign aims to make sure that people with depression both seek and get help.

28. According to the passage, what was the population of the world in 2015?

A. About 322 million. B. About 128.8 million.

C. About 8050 million. D. About 18.4million.

29. Which symptom is the worst among several symptoms?

A. Suicide. B. Loss of interest.

C. Sadness. D. Feelings of low self-worth.

30. What does the 3rd paragraph tell us?

　A. The pressures on today's youth are the same as other generations.

　B. The pressures on today's youth are not the same as other generations.

　C. The pressures on today's youth are bigger than other generations.

　D. The pressures on today's youth are not bigger than other generations.

31. What cause a lot of pressure for Chinese youth?

A. Competition between young generations.

B. Competition to outperform others.

C. Competition to perform better than others in education.

D. Education to avoid disorders.