早上 and下午are two coordinating words in this sentence, we tend to use和 to connect 早上and下午. In order to make the expression more fluently and logically, we would like to use an adverb of time 之后 to connect next sentense, like 早上和下午他散完了步之后，都跟邻居说了一会话，而晚上他就坐在桌子旁（听音乐）

see you again

I agree with you. Friends can get together because of the friendship. When you got friends, though they are with different opinions or from other cultures, you would still be active to know them ,care about them and help them when they are in trouble. Of cause,we got some opinions opposie sometime, but it's ok. It exactly is a process for us to get our thought exchaged and run, which could get us knowed each other better and more closed.With different friends, our life will be more   colourful and richer.