CASS画横断面时候，比如我一个断面测了9个点，画好的横断面怎么才能只显示这个9个点的形状的里程文件呢，就像下面的里程文件BEGIN,0.000:1-5.084822,84.582-1.982829,84.252-0.899045,83.895-0.859108,82.6790.000,82.6840.743119,82.6870.853113,83.9264.620544,83.422
BEGIN,0.000:1
-5.084822,84.582
-1.982829,84.252
-0.899045,83.895
-0.859108,82.679
0.000,82.684
0.743119,82.687
0.853113,83.926
4.620544,83.422
5.483644,83.169
BEGIN,20.000:2
-5.788812,84.34
-2.407997,84.26
-0.959417,83.95
-0.909245,82.64
-0.004737,82.65
0.702831,82.64
0.738804,83.96
5.461482,83.52
5.984902,83.07
