as easy as lifting one’s hand—not need the slightest effort ❍ 你总认为这种工作是～，老是大大咧咧的。You always think that this kind of job does not need much effort,so you’re always careless.
举手之劳
as simple as lifting a finger; it’s nothing 保护环境的～是节约能源。Energy efficiency is the low-hanging fruit in the campaign to protect the environment.