如何避免老人痴呆
http://cid-736f7d3a34137c2d.skydrive.live.com/self.aspx/%e4%ba%95%e5%ba%95%e4%b9%8b%e8%9b%99/%5E_%e5%a6%82%e4%bd%95%e9%81%bf%e5%85%8d%e8%80%81%e4%ba%ba%e7%99%a1%e5%91%86.ppt
