Zhihu Hot List
Latest recorded position: #8 on Oct 13, 2026, 8:01 AM CST.
Across 1 retained daily record, the best recorded rank was #8. From the first retained rank (#8) to the last (#8), this listing held the same rank.
Why do hospitals need to draw several tubes of blood for tests? Why can’t one tube be used for multiple tests?
为什么医院验血要抽好几管血？为什么不能一管多用？
ThreadEast first recorded "Why do hospitals need to draw several tubes of blood for tests? Why can’t one tube be used for multiple tests?" on Oct 13, 2026, 8:01 AM CST. It has been observed on Zhihu Hot List, with less than one hour between the first and latest recorded appearances.
What the trend data tells us
The English title describes the topic of the source listing. Its appearance in a ranking measures attention within that platform; the ranking alone does not explain the cause of a spike or verify the underlying claim.
This stable URL remains available after a topic leaves a live ranking. Observation span is elapsed time between sightings, not continuous time on a chart. Platforms use different ranking and heat systems; their metrics are not added together.
Original evidence
Source listings
ZH
Zhihu Hot List
Chinese source / Sign-in may be required
#8Source metric: 1,130,000 heat
Original source Daily ranking timeline
Up to 180 recent daily records from retained observations and preserved archives. The best rank and last rank can differ within a day. Times use China Standard Time (UTC+8).
| Day | Platform | Best rank | Last rank | Observations |
|---|---|---|---|---|
| 2026-10-13 | Zhihu Hot List | #8 | #8 | 1 |