Would you be happier if you spent more time discussing the state of the world and the meaning of life—and less time talking about the weather? It may sound counterintuitive (违反直觉的), but people who spend more of their day having deep discussions and less time engaging in small talk seem to be happier, said Matthias Mehl, a psychologist at the University of Arizona who published a study on the subject. "We found this so interesting, because it could have gone the other way—it could have been, 'Don't worry, be happy'—as long as you surf on the shallow level of life you're happy, and if you go into the existential (存在主义的) depths you'll be unhappy," Dr Mehl said. But, he proposed, substantive (实在的) conversation seemed to hold the key to happiness for two main reasons: both because human beings are driven to find and create meaning in their lives, and because we are social animals. "By engaging in meaningful conversations, we manage to impose meaning on an otherwise pretty chaotic world," Dr Mehl said. "And interpersonally, as you find this meaning, you bond with your interactive partner, and we know that interpersonal connection and integration is a core fundamental foundation of happiness." Dr Mehl's study was small and doesn't prove a cause-and-effect relationship between the kind of conversations one has and one's happiness. But that's the planned next-step, when he will ask people to increase the number of substantive conversations they have each day and cut back on small talk, and vice versa. Next, Dr Mehl wants to see if people can actually make themselves happier by having more substantive conversations. "It's not that easy, like taking a pill once a day," Dr Mehl said. "But this has always made me interested. Can we make people happier by asking them, for the next five days, to have one extra substantive conversation every day?"1. According to Dr Mehel, what kind of conversation is more likely to make people happier?A) About the chaotic things in people's life.B) About the interesting things in people's life.C) About the meaning of people's life. D) At the surface level of people's life.2. Why do people need to be engaged in substantive conversations?A) Because people naturally search for profound meaning in their lives. B) Because it is the essential basis of happiness for people.C) Because people intend to establish relationships with others.D) Because it is a necessity for people in modern society.3. According to the passage, what is the difference between a substantive conversation and a conversation at the surface level?A) A substantive conversation involves the meaning of living one's life. B) No relationship can be found at all between them.C) They have a cause-and-effect relationship.D) The passage does not mention.4. What will Dr Mehel plan to do next?A) He'll solely let others have more substantive conversations than small ones.B) He's sure that people are happier after increasing the substantive conversations.C) He'll prove either more deep conversations or small ones can make people happier. D) He'll be sure that deep conversations will make people actually happier.5. What does Dr Mehel think about his plan?A) He thinks it is as easy as taking medicine regularly.B) He thinks people will be very interested in conversations.C) He thinks his plan will be implemented in five days.D) He thinks it is difficult to manipulate.