D1=DISTND(1,2)                              !D1Ϊڵ12֮ľ
D2=DISTND(3,4)                              !D2Ϊڵ34֮ľ
MID=(DISTND(1,2)+DISTND(3,4))/2             !D1D2ƽֵ
N1=NDNEXT(1)                                !N1ΪڵŴ1һڵ
N2=NDNEXT(5)                                !N2ΪڵŴ5һڵ
N3=NDNEXT(10)                               !N3ΪڵŴ10һڵ
AREAND(NDNEXT(1)NDNEXT(5)NDNEXT(10))    !ɽڵN1N2N3Χɵε
