没事的，你可以观察，但不用担心。那种叫floor mats. 很多地方都有，网上可以去amazon:

http://www.amazon.com/s/ref=nb_*****_noss?url=search-alias%3Dbaby-products&field-keywords=floor+mat#/ref=nb_*****_noss_1?url=search-alias%3Dbaby-products&field-keywords=floor+mats&rh=n%3A165796011%2Ck%3Afloor+mats