It shows that successfulness in puncturing can be more easily achived by applying tourniquets in several times and releasing the tourniquets after each cannulation when a less venosity appears.
说明利用

在静脉充盈不佳
穿刺时,
分次扎止
和送
后松止

以提高穿刺成功率。
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洲 They've pre-positioned emergency supplies within each of their two cave tour areas, including snacks, first aid, space blankets, tourniquets, water, and even parts to build a rudimentary restroom—enough to get by until emergency crews can assist in a more full-scale evacuation.
他们在各自的两个洞穴游览区域内预先放置
应急物资,包括小吃、急救包、太空毯、止血带、水,甚至还有一些建造简易厕所的材料——足够在全面疏散前维持到救援队伍到达。