B, the fan has a cool breeze, which is suitable for summer but not winter. It is because the air flow is accelerated, which makes the sweat evaporate faster and thus cool; Instead of lowering the air temperature; Therefore, the meaning of the b symbol;

C, a drop of water can see the sun, and one thing can see the spirit; Because you can see the real image of the sun through a drop of water; Therefore, c does not match the meaning of the question;

D, people who don't see it smell it first, which is judged according to the different timbres of different people; Therefore, d does not match the meaning of the question;

so choose B.