Caffeine is a central nervous system stimulant that acts in many ways like other stimulant drugs such as amphetamines, waking you up and increasing your muscular activity.

• 当你吸吮第一杯咖啡或者早茶的时候仔细检查一下，这会帮你在心中安排好一天的事情，避免忘记重要事情的巨大压力。