| 摘要 | 第4-5页 |
| Abstract | 第5页 |
| Acknowledgements | 第6-10页 |
| Abbreviations | 第10-11页 |
| Chapter 1 Introduction | 第11-14页 |
| 1.1 The background of the research | 第11-12页 |
| 1.2 Research questions | 第12页 |
| 1.3 Organization of the thesis | 第12-14页 |
| Chapter 2 Literature Review | 第14-27页 |
| 2.1 Discourse and news discourse | 第14-16页 |
| 2.1.1 Discourse and discourse construction | 第14-15页 |
| 2.1.2 News discourse | 第15-16页 |
| 2.2 Critical Discourse Analysis | 第16-21页 |
| 2.2.1 Theoretical foundation | 第16-19页 |
| 2.2.2 Application of CDA in news discourse | 第19-21页 |
| 2.3 Corpus linguistics | 第21-27页 |
| 2.3.1 An introduction to corpus linguistics | 第21-22页 |
| 2.3.2 Corpus methods in CDA | 第22-27页 |
| Chapter 3 Research Methodology | 第27-32页 |
| 3.1 Research design | 第27页 |
| 3.2 Self-built corpora | 第27-30页 |
| 3.3 Tools and instruments | 第30页 |
| 3.4 Analytical tools | 第30-32页 |
| Chapter 4 Results | 第32-62页 |
| 4.1 The use of think tank in the two corpora | 第32-34页 |
| 4.2 The top 20 lexical words in the two corpora | 第34-35页 |
| 4.3 Diachronic comparison of the keywords in the ENCHA | 第35-41页 |
| 4.3.1 Diachronic keywords of the ENCHA | 第35-38页 |
| 4.3.2 Different news focus on think tanks from 2011 to 2014 | 第38-41页 |
| 4.4 Diachronic comparison of the keywords in the ENUSA | 第41-45页 |
| 4.4.1 Diachronic keywords of the ENUSA | 第41-42页 |
| 4.4.2 Different news focus on think tanks from 2005 to 2014 | 第42-45页 |
| 4.5 Collocates analysis of think tank in the ENCHA | 第45-52页 |
| 4.5.1 Collocates analysis on the left side of think tank | 第45-49页 |
| 4.5.2 Collocates analysis on the lright side of think tank | 第49-52页 |
| 4.5.3 Conclusion for the collocates analysis of think tank in ENCHA | 第52页 |
| 4.6 Collocates analysis of think tank in the ENUSA | 第52-62页 |
| 4.6.1 Collocates analysis on the left side of think tank | 第52-56页 |
| 4.6.2 Collocates analysis on the right side of think tank | 第56-61页 |
| 4.6.3 Conclusion for the collocates analysis of think tank in ENUSA | 第61-62页 |
| Chapter 5 Discussion | 第62-71页 |
| 5.1 Socio-political and economic system in China and the US | 第62-63页 |
| 5.2 Differences of diachronic representations of think tanks | 第63-65页 |
| 5.3 Differences in the attribute of think tanks in the two countries | 第65-67页 |
| 5.4 Differences in the fields think tanks focused on in the two countries | 第67-68页 |
| 5.5 Differences in the distribution of think tanks in the two countries | 第68-69页 |
| 5.6 Differences in the contributions of think tanks in the two countries | 第69-70页 |
| 5.7 Differences in the images of think tanks in the newspapers | 第70-71页 |
| Chapter 6 Conclusion | 第71-75页 |
| 6.1 Findings | 第71-73页 |
| 6.2 Limitations and implications | 第73-75页 |
| References | 第75-77页 |
