Final answer:
Without a clear narrative about a tree's offerings, the question about differences in the first and last encounters vs. in-between encounters cannot be answered definitively based on the text provided. The passages focus on themes like personal realization, journeys, and feeling like an outsider.
Step-by-step explanation:
The different aspects between the first and the last encounters versus all of the encounters in between from the passages you have provided seem to relate to b) the tree's offerings; at first, it was generous; at last, it had nothing. However, since the given text segments do not clearly depict a consistent story about a tree and its offerings, there might be a possibility of ambiguity in the given question. The narratives provided deal with themes of realization of differences, journeys through forests, and the experiences of being an outsider, which are distinct from what the question suggests. Therefore, it's challenging to pinpoint the exact differences without more context regarding the 'first and last encounters' mentioned in the question.