If you find the winter months tough, particularly during December and January you may suffer from Seasonal Affective Disorder, which causes a low mood caused by the lack of light during winter.

• “如果你觉得冬天很难熬，特别是在十二月和一月份，那么你可能患上了‘季节性情绪失调’，这是由于冬日里缺少阳光而引起的情绪低落。