可是租车公司没有提供第三方保险可以让你买啊。比如在AVIS网站上有下面的话:
Anyone driving an Avis vehicle will be protected against liability for causing bodily injury or death to others or damaging the property of someone other than the driver and/or the renter up to the minimum financial responsibility limits required by applicable law.
Avis provides statutory limits of liability insurance as shown on the rental agreement at time of rental. The Avis renter is responsible for all damage or theft of the Avis vehicle subject to certain exclusions contained in the Avis rental agreement. For an additional fee, Avis will waive or limit the renter's liability through the purchase of a Loss Damage Waiver at the time of rental. Please call 1-800-321-3652 for additional information.
另外可以买的保险没有是针对第三方的。