Examples of these style issues from Perry (1998) that talk about the style issues at the same time

The issue of communication with examiners is crucial. [this is a theme sentence or `flag' about the whole of this next section] Consider an examiner. [this is the theme sentence that summarises the whole of this paragraph] He or she may be reading the thesis at 11 p. m. on Friday after a hard day's work on more important things like their own research, their own students' research or morale in their Department. A major reason for their agreeing to examine the thesis is a sense of duty to their discipline. Thus the student should try to make the process of examination as much like a journey on 'autopilot' as possible, with changes in direction clearly marked, the track clearly flagged and each step in an argument explicitly explained, as described below. The examiner should not have to do any hard critical thinking as he or she follows the student's journey. In other words, the candidate should try to neither make the examiner think too much nor to go to sleep, rather, the examiner may hopefully drowse off for a minute or two, snapping fully awake every now and then to check that the thesis is still `on track' and fulfilling the expectations set up at the start of each 英语论文网 【http://www.51lunwen.org】section and sub-section of material. In brief, the reader must be guided along a smooth, easily-followed path towards the conclusions that have excited the candidate and will hopefully excite the examiner into passing the thesis and perhaps asking the candidate to work with him or her on a research project in the future. [this is a summary sentence that summarises and ties the whole paragraph together]

This easily followed communication can be achieved by using several principles. [notice the linker of `this... communication' with the previous paragraph that leads straight into the theme sentence that summarises the whole of this paragraph] Firstly, have sections and sub-sections starting as often as very second or third page, each with a descriptive hea, ding in bold. Secon