string(237) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8D%95%E4%BB%B6%E7%94%A8%E9%87%8F%E4%BB%B6%E6%95%B0%E8%AE%A1%E7%AE%97 => Failed to connect to 14.18.46.51 port 38044: Connection refused"
单件用量件数计算
