| 摘要 | 第5-6页 |
| Abstract | 第6-7页 |
| Chapter One Introduction | 第8-12页 |
| 1.1 Research Background | 第8-10页 |
| 1.2 Research objectives | 第10-12页 |
| Chapter Two Literature Review | 第12-20页 |
| 2.1 News Discourse and Ideology | 第12-13页 |
| 2.2 News Framing | 第13-16页 |
| 2.3 Alzheimer's Disease and Related Studies | 第16-20页 |
| Chapter Three Theoretical Framework and Methodology | 第20-27页 |
| 3.1 Theoretical Framework | 第20-22页 |
| 3.2 Methodology | 第22-27页 |
| Chapter Four Results | 第27-60页 |
| 4.1 News Headlines | 第27-35页 |
| 4.1.1 Drug trial and treatment frame foregrounding confrontation in The New York Times | 第27-30页 |
| 4.1.2 Risk avoiding frame foregrounding personal prevention in Wenhui Bao | 第30-35页 |
| 4.2 Topic Categories Covered in AD News Reports | 第35-49页 |
| 4.2.1 Episodic/thematic frames in the news | 第39-40页 |
| 4.2.2 Dominance of biomedical topics with varying levels of technicality | 第40-43页 |
| 4.2.3 Prevalence of personal prevention topic in Wenhui Bao | 第43-45页 |
| 4.2.4 Policy topic in The New York Times | 第45-46页 |
| 4.2.5 Personal story-the tale of two caregivers | 第46-49页 |
| 4.3 News Sources Covered in AD News Reports | 第49-60页 |
| 4.3.1 Dominance of professional sources:doctors, researchers and supporters | 第51-53页 |
| 4.3.2 Marginalized voice of AD patients | 第53-57页 |
| 4.3.3 Politicians as news sources in The New York Times and Wenhui Bao | 第57-60页 |
| Chapter Five Findings and Discussion | 第60-66页 |
| 5.1 Findings | 第60-64页 |
| 5.1.1 Different topicalization of news headlines | 第60-61页 |
| 5.1.2 Dominance of biomedical discourse | 第61页 |
| 5.1.3 Differences concerning episodic and thematic frames | 第61-63页 |
| 5.1.4 Marginalized voice of AD patients | 第63-64页 |
| 5.2 Discussion | 第64-66页 |
| Chapter Six Conclusion | 第66-69页 |
| References | 第69-76页 |
| Acknowledgements | 第76-77页 |
