有的人喜欢开灯睡觉,自以为有安全感。但医学家警告,开灯睡觉不但影响人体免疫力,而且容易患癌症。因为入睡时开灯将抑制人体内一种叫褪黑激素的分泌,使人体免疫功能降低,很容易受到病毒的威胁。国外已有研究显示,经常值夜 Some people like to sleep on lights, feel safe. However, medical experts warn that turning on the lights will not only affect human immunity, but also be susceptible to cancer. Because sleep when turning on the light will inhibit the body’s secretion of melatonin, so that the body’s immune function decreased, it is vulnerable to the threat of the virus. Studies abroad have shown that regular night