It discourages the use of illegal intravenous drugs, but it does speak to drug abusers and advises them to avoid sharing dirty needles.

手册不建议使用非法静脉注射药物，但也向毒瘾患者建议不要共享不干净的针管。

Crack isn't even an intravenous drug.

快克根本不是静脉注射毒品。

For example, the US has held back on harm reduction practices that would make intravenous drug use safer, in part because of stigma around recreational drugs.

比如，美国的共存措施能使静脉注射毒品的过程更安全，但却部分因为毒品相关的“污名化”而受到阻碍。

So the nurses decided that they were going to take a bag of the intravenous drugs and have them tested.

因此，护士们决定拿一袋静脉注射药物进行测试。

The next most common means of transmission include things like intravenous drug abuse and mother-to-child transmission, which can be via the placenta during delivery, or via breast milk.

其他常见的传播途径包括静脉注射毒品以及母婴传播，指分娩过程中通过胎盘，或是母乳传播。

Other causes are swelling of the tissue after severe burns, intravenous drug injection, repetitive use of the injured muscles or a vigorous muscle contraction, like in a tetany or seizures.

其他原因包括严重烧伤后组织肿胀、静脉药物注射、反复使用受伤的肌肉，或肌肉剧烈收缩，如手足搐搦或癫痫。