De Officiis

Quamquam te, Marce fili, annum iam audientem Cratippum, idque Athenis, abundare oportet praeceptis institutisque philosophiae

直接点名儿子+导师+地点——家书开篇即清晰，故清晰度为 88。

the theories of Aristo, Pyrrho, and Erillus have been long since rejected ... I shall, therefore, at this time and in this investigation follow chiefly the Stoics

Stoic 学派胜利+Aristo/Pyrrho 否定——后来哲学史大体确认，故准确性为 86。

Omnis de officio duplex est quaestio: unum genus est, quod pertinet ad finem bonorum, alterum, quod positum est in praeceptis

三卷对应三种哲学任务，结构极严，故结构为 90。

our first duty is to the immortal gods; our second, to country; our third, to parents; and so on, in a descending scale, to the rest

罗马生活具体化抽象原则，故例证为 88。

nor brave he surely cannot possibly be that counts pain the supreme evil, nor temperate he that holds pleasure to be the supreme good

四主德互证——virtue ethics 古典起点，故深度为 92。

(virtue ethics / 道德心理学 / 多层义务论均回到 Cicero)

当代伦理学仍对话 Cicero，但公元前 44 年局限仍需注释，故时效性为 84。

Quam ob rem magnopere te hortor, mi Cicero

古典散文的修辞与人情结合，Miller 译本保留拉丁长句，故文笔为 92。

Panaetius / Zeno / Chrysippus / Carneades / Cato / Scipio / Laelius

明引传统，非现代引文，但学术透明，故 sourcing 为 70。