这个过程也很漫长，持续到了上幼儿园的时候，大概1年左右。这一步现在看来，还是非常有必要的，非常好的缓解了孩子的分离焦虑。
million dollars and more often above that point than below. They were also large
。safew官方下载对此有专业解读
const cur = Number(num[i]); // 转数字方便比较（也可直接比较字符）
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