除非你真的理解了局部结构的用法,否则不要乱用。z1 = With[{eps = $MachineEpsilon}, NDSolve[{x y[x] + 2 y'[x] + x y''[x] == 0, y[eps] == 1, y'[eps] == 0}, y, {x, eps, 10}]];Plot[y[x] /. z1, {x, 0, 10}, Method -> Evaluated, PlotStyle -> Black]