老年痴呆会是个大问题。

国内患老年痴呆症的人越来越多，而能看这个病的医生寥寥无几。很多病患过得很痛苦，对家属也是很大的折磨。另外经济方面，也会是一个很大的负担。
At 71 Farmer Dresses Wife as China Faces Alzheimer’s Crisis
In China, there are only about 300 qualified physicians to treat more than 9 million dementia sufferers. The shortage is overwhelming families and threatening resources from an already stretched welfare system as the country ages.
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http://www.bloomberg.com/news/2014-01-27/at-71-farmer-dresses-wife-amid-china-alzheimer-s-crisis.html