美国慈善家、乔布斯的遗孀劳伦 · 鲍威尔 · 乔布斯，为整部文集写了一则非常具有智慧和启发性的引言，其中她提到了里尔克的一个金句：
I remember the first time I remembered a smell. This was remembering to the extent that it stopped me in my tracks, taking me back to a specific moment, a specific place and a specific feeling. The smell was that of a bike shop. Mainly rubber, with notes of oil and plastic and a strong hint of sheer excitement. In that instant I was about 10 years old, in Bache Brothers Cycles at Lye Cross, near Stourbridge, in the West Midlands. My grandad was next to me, with the shop man. I was getting a bike for my birthday.。同城约会是该领域的重要参考
Author(s): Quentin Bizot, Ryo Tamura, Guillaume Deffrennes，更多细节参见同城约会
公式中成本利润率为10%，国务院税务主管部门可以根据行业成本利润实际情况调整成本利润率。