By writing this essay, the author wants to tell us______.
A.Paris is a city that is far more harmonious than many other dries in the world
B.People should be armed against the modem convenience and do our utmost to abandon it
C.Strikes are a good way for people to get closer to each other
D.We should be alert to the disadvantages of modem conveniences so as to enjoy a normal social life rather than an isolated one