Complete the following passage by filling in each blank with one word that best fits the context.

He always rose early to enjoy at least two hours of staying alone in the house before the  48  of the family came down. In winter he spent most of the time reading. In summer he liked to get out of doors to work in the garden or to take the dog  49  a walk in the neighboring woods and fields. 50  the weather was like, there was plenty for him to do. He wrote book reviews regularly for two of the national weeklies. He worked hard 51  his special subject, Indian history, and was thus one of the world experts on it; he collected modern abstract paintings and so had a circle of friends among artists; there was hardly anything he did not know about traditional jazz and he often entertained  52 Britain and American jazz musicians. He was a good  53  and knew a lot about French and German food. His family admired him and in a sense he was spoiled by them. At first glance you would have  54  him for a retired army officer--- his hair was cut short, he was very particular about his clothes, 55 were always clean and neat . He hardly watched TV, but enjoyed a good film and an occasional evening at the theater.

启蒙文学的艺术特征？