研究目的如何寫

研究目的要如何寫？英文表示目標的字有1.purpose 2.aim 3.objective 4.goal 5.object 6.target
7.intent那到底要用那一個？
最常見的寫法是"The purpose of this study..." "The purpose of the study..."
次之為"the objectives of this study..." "the goal of this study"
較不常用的"the aims of this study..."