阅读下面短文，从每题所给的A、B、C、D四个选项中选出一个最佳选项。
Compared with other European countries, lifestyle in Italy is slower and more relaxing in its own way. Italians love to chat over a cup of coffee, go out for a walk in the middle of the day, and enjoy long lunches and dinners.
The family is important to Italians. They can't think of spending a day without talking about their parents and children, or a weekend without a family lunch or dinner. Italians living outside their country miss their family a lot.
Italians like simple life. Their days start and end with a cup of coffee. A cup of coffee after every meal is a must. Italians love to spend time over a hot cup of coffee and even hotter conversation with friends. Topics are usually about family, football and politics(政治).
Sport is a very important part in lives of many Italians. Football is their favorite sport. There are hundreds of football clubs with top football teams in Italy. Also, many top players from all over the world play in Italy. Volleyball is also popular and so is rugby, with the top rugby team playing for the European Challenge Cup.
Every Italian province, city, town and street has a historical event that took place there and the Italian calendar is filled with national holidays that they love to celebrate.
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＝1(a＞0)的离心率为2，a＝ ( )