文 [1 ]给出了文 [2 ]的一个统一命题 ,并利用一个引理给出了简证 ,遗憾的是统一命题虽对 ,但是引理不正确 ,为此特作更正 ,并用圆锥曲线的这一几何性质证明几个命题 .定理　设F是圆锥曲线的焦点 ,其相应的准线为L ,过L上一点M作直线交圆锥曲线于P ,Q两点 ,则MF平分∠PFQ ,或其 The paper [1] gives a unified proposition of [2] and uses a lemma to give a concise proof. Unfortunately, the unified proposition is correct, but the lemma is incorrect, and the special correction is made for this, and a conic curve is used for this purpose. This geometric property proves several propositions. Theorem Let F be the focal point of the conic curve, the corresponding guideline is L, the point M passing over L is the straight line conic curve at P and Q, then the MF bifurcation is PFQ, Or