The document outlines the steps of a typical fieldwork process:
1. Being puzzled by something and formulating a hypothesis to temporarily explain it
2. Choosing appropriate methods and instruments for investigation
3. Gathering data using tools and instruments
4. Presenting the collected data
5. Trying to make sense of the data and understand how it relates to the initial hypothesis
6. Answering the original question
It then provides two examples of applying this process to answer the question "Why is Mr. Luo so fat?". The hypotheses for the two examples are that Mr. Luo is fat because he doesn't exercise or because he eats too much.