统计一篇英文文章中每个单词的出现次数。
英文文章示例，“The quick brown fox jumps over the lazy dog. The dog barks loudly and the fox runs away quickly.”
The: 3
quick: 1
brown: 1
fox: 2
jumps: 1
over: 1
lazy: 1
dog: 2
barks: 1
loudly: 1
and: 1
runs: 1
away: 1
quickly: 1.