There are three main types of descriptive methods: observational methods, case-study methods and survey methods.
描述性研究法一共分为三类：观察法，案例分析法以及调研法。
This paper makes a survey and investigation on the English learning situation among Non-English Majors in Non-Governmental Colleges by means of the descriptive statistics and qualitative analysis.
本文以问卷调查的形式，通过描述性统计和定量分析，对民办院校非英语专业本科生的英语学习状况进行了调查研究。
Methods Retrospective survey and descriptive research analysis were made with annuals reports of infections diseases during 1984 and 2003 in Baoan District.
方法利用宝安区1984 ~ 2003年疫情汇编和宝安区统计局历年人口年鉴进行回顾性调查，并作描述性研究分析。
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