The World Health Organization estimates that there are as many as 120 million people suffering from depression worldwide, almost one in four will. Mental or behavioral problems occur at some stage in life. Global disease rankings are second, after heart disease. About 26 million people in China currently suffer from depression at different levels, but in sharp contrast to the high incidence of depression, 90% of people with depression Failing to see a doctor promptly because he didn't realize he might be suffering from depression. According to this text, we can know:. ["as many as one-quarter of the world's population suffer from depression.", 'heart disease currently ranks first in the global disease list.', 'the lack of timely medical treatment is the cause of the high incidence of depression.', 'No more than 3 million timely medical treatments for Chinese patients with depression.']