参考答案

正确答案：A
解析：文章第二段提到“Infection with HIV does not necessarily mean that a person has AIDS．Physicians prefer to usethe term AIDS for cases where a person has reached the final，life-threatening stage of HIV infection．”HIV 病毒感染到了危及生命的阶段才被称为艾滋病。可见本题说法与文章内容完全相符。