var opt0 = ["一级分类|0", "二级分类|0", "三级分类|0"];
var dsy = new Dsy();
dsy.add("0", ["出国留学|9"]);
dsy.add("0_0", ["直接出国|202","游学|816"]);
dsy.add("0_0_0", ["英国|263"]);
dsy.add("0_0_1", ["英国|1691"]);