string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E7%BA%A7%E5%BB%BA%E9%80%A0%E5%B8%882022%E6%95%99%E6%9D%90%E5%92%8C2023 => Failed to connect to 101.89.120.29 port 38058: Connection refused"
一级建造师2022教材和2023
