美国有将近三分之二的产业工人上班经常打瞌睡,从而引起了不安全和服务质量差的问题,加利福尼亚对4700工人进行一项调查表明,上班时特别是夜班时能否保持头脑清醒是防止事故的关键。 1979年美国三里岛核工厂事故;印度博帕尔毒气泄漏事件,苏联切尔诺贝利事故以及最近发生在美国的埃克森公司“瓦尔迪兹号”油轮石油外溢事故都发生在深夜或清晨。 Nearly two-thirds of industrial workers in the United States often doze off to work, causing unsafe and poor quality of service. A survey of 4,700 workers in California showed that staying alert at work, especially at night shifts, is preventing The key to the accident. The 1979 accident at the Three Mile Island nuclear plant in the United States; the Bhopal gas leak in India, the Chernobyl-Soviet accident and the Exxon’s “Valdez” oil spill that took place in the United States recently occurred overnight or early in the morning .