1. Anthony Dooly, Professor for Mathematics, said: it is not reliable to apply mathematics into emotional problems.
数学教授安东尼杜利说：把数学运用到感情问题中通常不保险。
2. Heller—Knight Model stressed the balance of trades effect in the currency structure of foreign exchange reserves decision. Dooly model shows the trade flows, the debt payment and the exchange arrangements will all affects the currency structure of foreign exchange reserves. There is some logic to each of these three models, but are not comprehensive enough.
资产组合理论强调货币的收益与风险在安排外汇储备币种结构中的作用，海勒——奈特模型强调贸易收支在决定外汇储备币种结构中的作用，杜利模型则将影响外汇储备币种结构的因素扩大为贸易流量、外债支付及汇率安排三个因素。
3. Followed from the currency reserve structure to optimize the structure of the main factors affecting research, this paper introduces the three theoretical models: Asset Portfolio Theory, Heller—Knight Model and Dooly Model. Portfolio Theory stresses the returns and risks in arranging the structure of foreign exchange reserves.
紧接着从优化储备货币结构入手，对影响结构的几个主要因素进行了研究，并介绍了外汇储备币种结构选择的三大理论模型，即资产组合理论、海勒——奈特模型和杜利模型。