为啥有人手上青筋暴起？这些地方出现青筋，一定要小心→
Kienle A, Lilge L, Vitkin IA, et al. Why do veins appear blue? A new look at an old question. Appl Opt. 1996;35(7):1151.
Kienle A, Lilge L, Vitkin IA, et al. Why do veins appear blue? A new look at an old question. Appl Opt. 1996;35(7):1151.