Hospitals have hundreds of devices registering alarms. Too often, they're crying wolf.
医院有数百个设备在注册警报。很多时候，他们在喊狼来了。
英语百科
Device register
A Device Register is the view any device presents to a programmer.
Each programmable bit in the device is presented with a logical address and it appears as a part of a byte in the device registers. Then programming of these bits can be achieved by reading from or writing to these device registers.
Most devices have at least these two device registers: