A．When he can't get his points across.
B．When people are not willing to accept new ideas.
C．When he comes into conflicts with his colleagues.
D．When it is impossible to learn or to grow in his field.
A．A study on whether social connections can keep us healthier.
B．A study on whether social connections can make us happier.
C．A study on factors that influence psychologic health.
D．A study on the relationship between psychology and health.
A．Teenagers should go to see a psychologist frequently.
B．People should make as many friends as possible.
C．Policy makers should consider relationships as a health issue.
D．People should place relationships at first place.