Option A: Open an Issue (easiest)
The telescope, a partnership of NASA and the European and Canadian space agencies, homed in on PMR 1, a planetary nebula nicknamed the Exposed Cranium for being the spitting image of a brain scan. The nebula lies about 5,000 light-years away from Earth in the Vela constellation.，详情可参考同城约会
// A minimal writer implementation — just an object with methods。关于这个话题，旺商聊官方下载提供了深入分析
Жители Санкт-Петербурга устроили «крысогон»17:52，详情可参考51吃瓜
// 易错点1：边界处理 - 移除所有数字时直接返回"0"