So, these are reviews of hundreds of studies by all the big muckety-mucks of the scientific pantheon in the United States, and these are the studies that show needle programs are effective -- quite a lot of them.
于是上百个研究的数据 被大型的muckety-mucks 美国科学界圣人验证， 而大量的研究表明 针头计划是有效的。