Nowadays，we are exposed to a large amount of information，which have limited knowledge.we are not enable ro tell them whether it is true or false.people who lack of experience，especially old people，will readily believe everything they see，thus feeling worried when they come across something different from what they have learned long long age.what's more，glancing over plenty of information will fool their eye.For these appearence，in order to protect ourselves，we should get information from authoritative resource and think twice before we trust them. On the part of government，they ought to take an active and effective measure.