寒假期间，小鹏拿着春节时父母给的“压岁钱”，到自家附近的电子游戏室玩，只玩了几天就把钱输光了。这时，一个经常来玩的叫大头的人对他说：“怎么？没钱了？不要紧，我们来赌一赌赛车，你赢了就给你50元好吧？”小鹏想了想，自己没有钱了，可又很想玩，也不敢向父母要，就咬牙答应了。第一场就赢了50元，他高兴极了，没想到这是陷阱，后来是乒败如山倒，小鹏欠了大头近千元，大头就教小鹏去偷自行车卖，卖了去还债。一次当小鹏又偷自行车时，被警察叔叔抓住，送进派出所。
结合材料，请回答： 

“舟师识地理，夜则观星，昼则观日，阴晦则观指南针。”这说明，中国古代四大发明之一的指南针，对于古人在哪一方面的活动有着重大的意义（  ）

    Growing roots

    When I was growing up, I had an old neighbor named Dr. Gibbs. He didn't look like any doctor I'd 1 known. When Dr. Gibbs wasn't 2 lives, he was planting trees.

    The good doctor had some3 theories on planting trees. He believed in “No pains, no gains”. He never 4 his new trees, which was5 many people. Once I asked why. He 6 that watering plants spoiled them, and that if you water them, each following tree generation will 7 weaker and weaker. So you have to make things8 for them. He talked about how watering trees

    9 shallow roots, and how trees that weren't watered had to grow deep roots in

    10 of water. I came to understand that he meant deep roots were to be 11 I planted a couple of trees a few years back and I took good care of them. Two years of12 has resulted in trees that expect to be waited on hand and foot. Whenever a cold wind blows, they 13and tremble their branches. Funny things about those trees of Dr. Gibbs'. The lack of water seemed to 14them in ways comfort and ease never could.

    I used to15for my sons that their lives will be easy. But16 I've been thinking that it's time to17 my prayer. I know my children are going to meet

    18 and I'm praying they will be strong. The prayer for comfort is seldom met. What we need to do is to pray for deep roots,19when the winds blow, we won't be20away.