美国塞利曼博士是一位著名的心理学家。他花了二十多年的时间,找了一万多人做一些心理实验,实验的结果显示:在挫折中消极、悲观的人往往会自怨自艾生出病来,有些严重的甚至会导致死亡。塞利曼还利用一件具有悲剧色彩的事来证明他的理论:一家铁路公司有一位调车员尼克,他工作相当认真, Dr. Seliman of the United States is a famous psychologist. He spent more than 20 years looking for more than ten thousand people to do some psychological experiments. The result of the experiment shows that negative and pessimistic people in frustration often complain of illness and some serious ones can even lead to death. Selimman also used a tragedy to prove his theory: a railroad company has a maneuver Nick, he worked very seriously,