所有Google搜索结果都是这样的重定向链接:http : //www.google.com/url? sa=t&rct=j&q=&esrc=s&source=web&cd=19&ved=0CHUQFjAIOAo&url =http%3A%2F%2Fwebapps.stackexchange.com %2F&ei = jNV0T4a0EYTw0gGkxsX_Ag&usg = AFQjCNFUKoDTez5xOnJZaRkn0OLZIclKtQ&sig2 = siQi9Rk3h_zHwaNC2n_MMg
Google为什么要这样做?