string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%B5%84%E6%9C%AC%E6%80%A7%E6%94%AF%E5%87%BA%E6%9C%89%E5%93%AA%E4%BA%9B%E7%89%B9%E7%82%B9%E5%92%8C%E4%BD%9C%E7%94%A8 => Failed to connect to 101.89.159.206 port 38075: Connection refused"
资本性支出有哪些特点和作用
