(x in [a[i]..(a[i]+g[i])])and(y in [b[i]..(b[i]+g[i])])
(x>=a[i])and(x<=a[i]+g[i])and(y>=b[i])and(y<=b[i]+k[i])
用后者判断能全AC但是用前者却不行，想不通为什么，请求各位赐教