英文摘要大概的句式结构是什么样的

英文摘要通常包括以下句式结构：

Background/Introduction: Introduce the topic and provide background information. 例句：This study aims to investigate the effects of social media on teenagers’ mental health, as social media has become an increasingly important part of their lives.
Objectives/Purpose: State the research objectives and/or purpose of the study. 例句：The objective of this study is to examine the relationship between social media use and depression/anxiety symptoms in teenagers.
Methods: Describe the research methods used, including the sample size, data collection procedure, and statistical analysis. 例句：A sample of 500 teenagers aged 13-18 was recruited for this study, and data was collected through a self-administered questionnaire. Statistical analysis was conducted using SPSS.
Results: Present the main findings of the study. 例句：The results showed that there was a significant positive correlation between social media use and depression/anxiety symptoms in teenagers.
Conclusion/Implications: Summarize the main conclusions of the study and discuss the implications for future research and/or practice. 例句：These findings suggest that social media use may have negative effects on teenagers’ mental health, and highlight the need for further research and interventions to address this issue.