The Ministry of Health has called for more awareness from the public on the mental health of the young,as part of efforts to mark World Mental Health Day. More than 15 percent of the Chinese youth have been found with mental problems,and about 30 million young people under 17 are suffering from depression,the Shanghai-based Wenhui Daily reported. The World Health Organization estimated that before 2020,the rate of children with mental problems will increase to 50 percent,and mental problems will become a major factor behind death and illness in the young worldwide. Deng Xiaohong,the spokesperson for the Beijing Municipal Health Bureau,said rapid social change is one of the reasons behind the rising number of youngsters with psychological problems. If these mental diseases are not _ on time,occurrence of crime,drugtaking and other dangerous behavior are expected to rise. Experts said mental disease could be caused by many factors,such as the inability to handle interpersonal relations well,unstable emotions and pressure from the overload of study. A number of experts have also said the one-child policy is another reason leading to poor mental health in the young. Children were said to be too "spoiled" and "selfish" in one-child families. Schools in many cities were reported to roll out measures to help students maintain their mental well-being. Yin Jingmiao,a teacher of the Beijing No. 105 Middle School,told China Daily that the school invites psychologists to provide counseling to students three times a month. "Students can be arranged to have 40-minute counseling sessions," Yin said. The school also gives lectures on mental health to senior grade students before they take the national college entrance exams,to help ease any anxiety arising from the tests. Which of the following statements is true according to the passage?
By 2020,about 50 percent of the students in China will have mental problems. Mental problems mainly appear among the youth while they are seldom seen among adults. China has the largest number of youngsters with psychological problems. Many schools have realized the problem and taken measures.