河北
【写在最后】
·茶中的咖啡因含量很难量化，茶种、冲泡量、温度、时间、次数都会对咖啡因浓度产生影响。
·经加工、冲泡后的茶，维生素和矿物质会逐渐损失。
·如今，出现于宋代的花茶也越来越受欢迎。木樨、茉莉、玫瑰、蔷薇、兰蕙、橘花、栀子、木香、梅花皆可作茶。
参考资料
[1] https://news.un.org/zh/story/2020/05/1058092
[2] https://mp.weixin.qq.com/s/RtGtN3UTaqsnebbQiouK4A
[3] https://mp.weixin.qq.com/s/spcMV0rwpTgc3jNejC8w_A
[4] https://pubmed.ncbi.nlm.nih.gov/31216091/
[5] https://pmc.ncbi.nlm.nih.gov/articles/PMC7360449/
[6] https://pmc.ncbi.nlm.nih.gov/articles/PMC8189915/
[7] https://www.mdpi.com/2304-8158/11/23/3930/
[8] https://www.who.int/zh/news-room/fact-sheets/detail/anaemia
[9] https://www.nejm.org/doi/full/10.1056/NEJMicm1200995
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