答案：A

concise (="brief;" giving much information in few words) 简明扼要的： clear 清楚的。precise (="exact;" correctly stated; free form error) 精确的, 明白无误的; elaborate (="worked" out with much care; carefully prepared) 精心制作的, 丰盛的：孤立地看, 似乎4个形容词均能修饰report, 但从句子的逻辑关系看, 后半句中有only in a few pages but with all the details, 故concise 是最贴切的选择了。