写作。

The picture shows two people sitting in a restaurant wearing gas masks. As we can see from the picture, there are a lot of smokers around the two people. Although they sit in a non-smoking section, they still can't escape from the terrible second-hand smoke coming from smokers around them.
Assigning non-smoking areas in restaurants is not enough. Suppose you' re eating at a smoke-filled restaurant, even sitting in the non-smoking section, you may still be coughing and choking because smoke travels quickly among tables. And whenever you have to use the restroom, you have to hold your nose as you pass through the smoking area. Guests should be able to enjoy their meals without choking on someone else's smoke. What smokers do at their own homes is their business, but once they pollute the public area with smoke--inducing toxic fumes, it becomes others' business.