1. Excessive consumption of coffee can lead to caffeinism, causing symptoms such as anxiety, restlessness, and insomnia.
喝咖啡过量会导致咖啡因中毒，出现焦虑、不安和失眠等症状。

2. Some individuals may have a hypersensitivity to caffeine, resulting in symptoms of caffeinism even with moderate consumption.
部分人可能对咖啡因过敏，即使适量摄入也会出现咖啡因中毒的症状。