string(266) "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%8E%E6%8A%98%E6%97%A7%E7%9A%84%E6%AF%94%E5%80%BC => Failed to connect to 101.91.112.32 port 38162: Connection refused"
资本性支出与折旧的比值
