But here's the thing: Why was bloodletting so popular in so many places for so long?

为什么这么长时间以来，放血在那么多地方如此流行？

They include bloodletting tools and cobalt glass bottles to store poisonous liquids.

包括采血工具和储存有毒液体的钴蓝色玻璃瓶。

The bloodletting in public markets has left many wondering about private technology startups.

公开市场上的大出血让许多人对私营科技初创公司产生了怀疑。

To correct the balance of these fluids, doctors employed dangerous treatments like bloodletting and purging.

为了矫正这四种体液的平衡，医生采用了放血和净化等危险的治疗方法。

Physicians would try any desperate measure, bloodletting was tried, leeches were used, but none seemed to work.

内科医生用尽各种权宜之计，尝试过放血 水蛭吸血等方法 但没有一种方法得见起效。

Scenes depicting ritual bloodletting as well as parades of musicians hint at a complex culture that fascinates us to this day.

描绘放血仪式和乐师游行的场景暗示了一种复杂的文化，至今仍吸引着我们。

Therapeutic phlebotomy or bloodletting can be used to manage iron overload, as well as deferoxamine, an iron chelating agent.

治疗性静脉切开术或放血疗法可用于治疗铁超负荷，也可使用铁螯合剂去铁胺。

Some seem strange now, like the bloodletting tools.

有些现在看起来很奇怪，比如放血工具。

It is not clear that such bloodletting is required.

目前尚不清楚是否需要这样的放血。

First, the chosen ones had to complete a four-day fasting and bloodletting ritual.

首先， 被选中的人必须完成为期四天的禁食和放血仪式。