黄土高原某地区沟壑纵横，目前正大力推广以草产业为主的农业生产模式，取得了明显的综合效益。下图示意该区域的农业生产模式。回答下面小题。 

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（﹨）划掉。

修改：在错的词下划一横线（__），并在该词下面写出修改后的词。

注意：1）每处错误及其修改均仅限一词；

2）只允许修改10处，多者（从第11处起）不计分。

    My friend Kevin had started waking up early and decided that he was going to do it completely natural so he quit drinking coffee. This is similar to everyone who never works out and then decide he is going to run a marathon the next day.

    It didn't work out for Kevin. He was miserable after a couple of day and decided to give up woke up early and went back to drinking coffee.

    Personally, I had to drink a ton of coffee when I first started waking up early. I've been able to cut them back dramatically but it's what I needed readjust my internal clock early on. Nowadays I really don't need any caffeine (I usually just drink a cup of green tea in the morning) but I want to share a reality of what I have experienced.

根据以下材料，写一篇不少于800字的文章。角度自选，立意自定，题目自拟；诗歌除外，文体自选。

    据研究，美国空军战斗机失误频繁的一个重要原因是：驾驶舱是按照飞行员身体特征的平均值设计的。可飞行员不是按平均值生长的，当他们必须在少于半秒钟内做出判断和行动时，平均值系统和操作员之间的矛盾就容易导致一系列事故。后来，美国空军要求制造商改变设计，让座舱能随飞行员的个体特征做局部调整，让系统适应个人。此后战斗机事故率降低，作战水平也得到了提升。