Secondly, athletes and entertainers are the source of

Firstly, famous entertainers and athletes have to make painstaking efforts,Let's take athletes as an example. Athletes are constantly having time-consuming training.They not only play games, but also train in the off-season and during the season. They have to give up time with their family to travel. Besides they also have to sacrifice their privacy. Famous people must undergo the intense scrutiny of the media, television and newspapers. This is a difficult lifestyle to lead, as one must constantly be careful of what he says or does in public. Another factor to consider is the risk of injury. Houston Rockets' star centre Yao Ming suffered from knee and leg injuries before he managed to attend the 2008 Beijing Olympics.