1目的(Objective)直接、准确地说明研究目的或所阐述的问题。亦可在摘要的开始,简要说明提出问题的背景。2方法(Methods)对研究的基本设计加以描述。包括研究对象的数量及特征,以及在研究中因副作用或其他原因而撤销的研究对象数目;观察的主要指标及主要研究方法;诊断标准、分组情况及随访时间;治疗手段包括使用方法及作用时间等。临床研究需说明是前瞻性或回顾 Objective A direct, accurate description of the purpose of the study or the problem that is being addressed. At the beginning of the summary, a brief description of the context in which the question was asked can also be given. 2 Methods Describe the basic design of the study. Including the number and characteristics of subjects and the number of subjects withdrawn due to side effects or other reasons in the study; the main indicators of observation and the main research methods; diagnostic criteria, grouping and follow-up time; treatment methods include the use and duration of action Wait. Clinical studies need to be prospective or retrospective