string(240) "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%E4%B8%BE%E4%BE%8B%E5%AD%90 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
资本性支出举例子
