| 英文摘要 | 第1-4页 |
| 中文摘要 | 第4-7页 |
| Chapter 1 General Introduction | 第7-11页 |
| 1．1 Introduction | 第7-8页 |
| 1．2 Research Hypothesis | 第8-9页 |
| 1．3 Justification of the Study | 第9-11页 |
| Chapter 2 A Brief Review on Related Concepts and Research | 第11-31页 |
| 2．1 Prosody | 第11-22页 |
| 2．1．1 The Intonation Unit | 第11-13页 |
| 2．1．2 Pitch Analysis | 第13-14页 |
| 2．1．3 The Study of Pitch Phenomena in Discourse | 第14-19页 |
| 2．1．4 Pitch and Discourse Structure | 第19-22页 |
| 2．2 News Analysis | 第22-31页 |
| 2．2．1 The Definition of News | 第22-23页 |
| 2．2．2 News Structure | 第23-26页 |
| 2．2．3 BBC Broadcast News Style | 第26-27页 |
| 2．2．4 The Structure of Summary Lead | 第27-31页 |
| Chapter 3 Methods and Data | 第31-41页 |
| 3．1 Methodological Issues in the Study of Pitch Phenomena | 第31-37页 |
| 3．1．1 Some Variables that can Affect Fundamental Frequency Values | 第31-35页 |
| 3．1．2 Pitch Range:Measuring Procedures | 第35-37页 |
| 3．2 Pitch in the Data:an Overview | 第37-41页 |
| 3．2．1 General Characteristics of the News Leads | 第38-41页 |
| Chapter 4 Data Analysis on Pitch Range,Pitch Reset,and Boundary Tone | 第41-61页 |
| 4．1 Pitch Range Cycle in Broadcast News Leads | 第41-44页 |
| 4．2 Pitch Range in News Sections | 第44-48页 |
| 4．3 Pitch Reset as a Cue for News Structure Segmentation | 第48-55页 |
| 4．4 Boundary Tone as a Cue for News Segmentation | 第55-58页 |
| 4．5 Summary and Conclusion | 第58-61页 |
| Chapter 5 General Discussion and Conclusions | 第61-67页 |
| 5．1 An Overview of the Study | 第61-62页 |
| 5．2 Prosodic Features at the Local Level:Marking News Boundaries | 第62-63页 |
| 5．3 Prosodic Features at the Global Level: Characterizing News Sections | 第63-65页 |
| 5．4 Limitations, Contributions and Future Research | 第65-67页 |
| Published Paper | 第67-68页 |
| Acknowledgements | 第68-69页 |
| References | 第69-71页 |
