介绍:
1. It's fair to say that people tend to be far more cheery and happy during the summer time when the weather is good rather than the gray and dreary months of winter. But, can the seasons really affect our mood and behavior?
2. There is a small subset of the population who do suffer during the winter months from a condition known as Seasonal Affective Disorder. This is suitably shortened to the term SAD.
3. Exposure to daylight is thought to be one of the main culprits behind this disorder with people typically seeing reduced daylight hours during the winter months.
4. This leads to symptoms such as low mood, fatigue, all of which are commonly associated with SAD. It's thought that this disorderis a biochemical evolutionary hangover from our mammalian ancestors who typically hibernated during the winter months.
毫不夸张地讲，人们往往在天气良好的夏季——远较于灰蒙蒙沉闷枯燥的冬三月——来得更欢快愉悦。但是，季节真的会影响我们的心情和行为吗？
有一小群人在冬季的确会遭受一种被称为“季节性情绪紊乱”的疾病。如你所料，这种疾病简称为术语 SAD。
人们认为导致该情绪紊乱的主要元凶之一是日光暴露的长短。冬季人们看到日光的时间更短暂。
这就引发了情绪低落、疲劳等症状，这些症状通常都与 SAD 相关。人们认为该情绪紊乱是哺乳性祖先生化进化的残留，过去他们通常会在冬季进行冬眠。
