元旦是指一年开始的第一天。此日相关的地理现象叙述正确的是（ ）
A：北半球春季的开始
B：直射点向北移动
C：地球在远日点附近
D：北京昼渐短夜渐长
Jim records his physical training every time so that he can it and think about how he should improve it the next day.
