string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8A%97%E5%8E%8B%E5%BC%BA%E5%BA%A6%E7%BB%93%E6%9E%9C%E7%9A%84%E5%A4%84%E7%90%86 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
抗压强度结果的处理
