string(268) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=etf%E5%9F%BA%E9%87%91%E4%B8%8B%E6%8A%98%E8%B5%84%E9%87%91%E4%BC%9A%E5%B0%91%E4%B8%80%E5%8D%8A%E5%90%97 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
etf基金下折资金会少一半吗
