string(258) "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%E7%9A%84%E7%89%B9%E7%82%B9%E5%8C%85%E6%8B%AC => Failed to connect to 101.89.159.206 port 38087: Connection refused"
资本性支出的特点包括
