The frail elderly often suffer from a combination of multiple chronic diseases that jointly produce disability and predispose them to vulnerability in the face of acute illness.
老年人身体衰弱，往往患有多种慢性病，从而导致残疾，并且极易受急性病患的侵害。
2
One explanation for the ineffectiveness of the annual exam in reducing the death rate is that it does little to avert death or disability from acute problems.
每年体检在降低死亡率方面没有效果的一种解释是，对于急性原因导致的死亡或残疾，它几乎没有作用。
3
Acute stroke unit care is known to be cost effective and all acute stroke patients can benefit from care in these units with lower risks of death and disability.