2. 那我们怎么判断常规文献中说的，或是BioBank里所说的杯，具体是指多大的杯子，多少克茶叶？如下参考文献：
参考文献1：
a. 1杯约200 mL—— 原句：the numbers of cups of tea consumed (with a standard cup size of 200 mL)
b. 1杯约2g茶叶—— 原句（3杯茶对应 6–8 g of tea）：consuming around 3 cups of tea or 6–8 g of tea leaves per day may offer the most evident anti-aging benefits.
c. 论文地址：
https://www.thelancet.com/journals/lanwpc/article/PIIS2666-6065(23)00273-0/fulltext
参考文献2：
a. 1杯约150 mL——原句：The participants drank five cups (150 mL x 5 cups=0.75 L) of green tea each day.
b. 1杯约 0.75g茶叶——原句：Standard green tea (10 g) was steeped in 2,000 mL of boiling water.
c. 论文地址：
https://pubmed.ncbi.nlm.nih.gov/29203963/
参考文献3：
a. 用了UK Biobank的数据，但里面提到的Standard green tea，参考的是文献二的数据：
b. 1杯约227 mL——原句：A cup of pure green tea usually contains around 25 mg of caffeine per 8 oz serving, which is considered to be a low amount (文献二).
c. 1杯约1.13g茶叶——按227 mL计算
d. 论文地址：
https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2022.801591/full