填空题

A child laughs 40 times a day for no reason, as the average adult (1)______
laughs 20 times the day. The school, the job and the social conventions lead us (2)______
gradually to get serious and to lose the ability to laugh spontaneously. It’s real loss,
(3)______
but it has been shown scientifically that the sense of humor and laughter (4)______
is good for your health and is also a very effective antidote against stress.
Fun is a nice feeling for us and also a means of protection and treat. Laughter is a good
(5)______
means of relaxation and also releases inner tension.The laughter enhances (6)______
the body oxygenation, stimulates the diaphragm, and eliminates the
residues in the lungs. In additionally, it increases the breathing capacity and reduces muscle
(7)______
tension. In cardiovascular terms, 20 seconds of intense laughter equals to 3 (8)______
minutes of fast walks. As can be seen, laughter is really a kind of therapy. Several (9)______
studies have found out that laughter contributes significantly the stress relief, (10)______
increases the pain tolerance (after surgery, migraines, arthritis), reduces the blood
pressure and it increases the levels of happiness hormone.