for introduction
general problem area
• Provide an overview of the review 文献概述
• Explain the importance of the topic
for body part
• Provide a critical synthesis of literature 批判性文献综述
• Situate within the context of the field 研究领域背景定位
• Identify relations between different studies
• Identify trends and themes 确定研究趋势和主题
• Contrast different approaches
• Point out inconsistent findings提出各个研究不一样的地方
• Cite works to strengthen arguments
• Include key studies and authors 包含关键研究和作者
• Identify gaps in the literature 指出文献不足之处
• Describe methodological quality of research 描述研究的方法论
• Review studies separately
