\usepackage[style=alphabetic,maxnames=4,minnames=3,maxbibnames=99]{biblatex}

@misc{gurobi_zhihu,
  author = {知乎},
  title = {Gurobi 课程介绍},
  howpublished = {\url{https://zhuanlan.zhihu.com/p/55648822}},
  note = {Accessed: date-of-access}
}

@misc{china_nutrition_society,
  author = {中国营养学会},
  title = {食物营养成分数据库},
  howpublished = {\url{https://nlc.chinanutri.cn/fq/}},
  note = {Accessed: date-of-access}
}

@misc{csdn_blog_post,
  author = {CSDN},
  title = {数学建模常用算法之一线性规划},
  howpublished = {\url{https://blog.csdn.net/zzzzzxxxxxaaa/article/details/126225716}},
  note = {Accessed: date-of-access}
}