string(246) "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%E5%90%AB%E4%B9%89%E6%98%AF => Failed to connect to 14.18.46.51 port 38206: Connection refused"
资本性支出的含义是
