对于某些健康问题 — — 比如高胆固醇 — — 筛查能产生积极效果：做一下简单的血液测试，测量一下血液中好胆固醇和坏胆固醇的数量就能让诊断相关心血管疾病更加容易，心血管疾病可能导致心脏病发或中风。
For some health issues – such as elevated cholesterol – screening yields positive results: a simple blood test measures the amounts of good and bad cholesterol in the blood, making it easier to detect related cardiovascular disease, which could lead to heart attacks or strokes.