下列何者為性傳染病的一級預防？
Which of the following is a primary prevention for STI (Sexually Transmitted Infections)?
- AAntibiotic treatment for gonorrhea淋病的抗生素治療
- BPartner notification and testing通知伴侶並進行檢測
- CRoutine syphilis screening例行梅毒篩檢
- DConsistent use of condoms✓ 正解持續使用保險套
性傳染病（STI）的一級預防是指在「感染發生前」採取阻斷措施。保險套能有效阻擋體液交換，防止病原體傳播，是最直接的防禦手段。篩檢（Syphilis screening）、抗生素治療（Gonorrhea treatment）與接觸者追蹤（Partner notification）均屬於感染後的介入，旨在減少併發症或中斷傳播鏈，均歸類為二級預防。
Primary prevention of sexually transmitted infections (STIs) refers to interventions that block infection before it occurs. Condoms effectively prevent the exchange of body fluids and block pathogen transmission, making them the most direct line of defense. Syphilis screening, antibiotic treatment for gonorrhea, and partner notification are all post-infection interventions intended to reduce complications or interrupt the chain of transmission, and are therefore classified as secondary prevention.