Choose the closest paraphrased version after the following sentence or the italicized part.
If you have wide and keen interests and activities in which you can still be effective, you have no reason to think about the merely statistical fact of the number of the years you have already lived...（ ）
A、
...the exact length of your lifetime should be your only concern...
B、
...the value of the years you have lived would be self-evident...
C、
...you have every reason to forget about the pain in old age...
D、
...you don't have to worry about your old age...
【正确答案】：D
【题目解析】：
句子释义：如果你有广泛和强烈的兴趣，并且参加力所能及的活动，你就没有必要去考虑你已经过了多少岁月这种纯粹的统计事实，更没有必要去考虑未来的时光会多么短暂。
D选项“…你不必担心自己的年龄…”符合题意。