high-risk population的用法和樣例：
例句
- Haing unusual moles, exposure to sunlight and being fair-skinned are thought to place people at higher risk.
具有較大的痣，接受陽(yáng)光暴曬和較淺膚色者被認為是皮膚癌的高危人群。 - Chemoprophylaxis of close contacts and vaccination of high-risk population groups is ongoing.
密切接觸者的化學(xué)預防和高危人群組的預防接種正在進(jìn)行。
