string(312) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%94%B6%E7%9B%8A%E6%80%A7%E6%94%AF%E5%87%BA%E5%92%8C%E8%B5%84%E6%9C%AC%E6%80%A7%E6%94%AF%E5%87%BA%E7%9A%84%E5%8C%BA%E5%88%AB%E4%B8%BE%E4%BE%8B => Failed to connect to 101.89.166.210 port 38089: Connection refused"
收益性支出和资本性支出的区别举例
