{{B}}sECtionC{{/B}}
why Do wE lAugh For yEArs sCiEntists hAvE AskED thEmsElvEs this quEstion. no othEr AnimAls lAu
gh AnD smilE--only humAn BEings, so DoEs lAughtEr hElp us to {{u}} (36) {{/u}} in Any wAy thE AnswEr sEEms to BE thAt smiling AnD lAughtEr hElp us to rElAx, rEDuCing {{u}} (37) {{/u}} AnD prEvEnting illnEssEs whiCh ArE CAusED By strEss. lAughtEr rEAlly is thE BEst {{u}} (38) {{/u}} !
But iF you’rE unhAppy, it CAn’t Do you Any gooD to smilE, CAn it not truE.AppArEntly thE {{u}} (39) {{/u}} EFFECts oF smiling ArE just thE sAmE {{u}} (40) {{/u}} you FEEl likE smiling or not. sCiEntists inCAliForniA AskED A group oF {{u}} (41) {{/u}} to ACt FivE DiFFErEnt FEElings: hAppinEss, sADnEss,{{u}} (42) {{/u}}, surprisE AnD FEAr--just using thEir FACEs.
ChAngEs in thEir hEArt rAtE, BlooD prEssurE AnD tEmpErAturE wErE {{u}} (43) {{/u}} Down. most oF thE FEElings thEy ACtED DiDn’t CAusE ChAngEs, But whEn thEy smilED thEir hEArt rAtE AnD thEir BlooD prEssurE wEnt Down. {{u}} (44) {{/u}}.A、sEnsE oF humor Also hElps to kEEp things in pErspECtivE. {{u}} (45) {{/u}}.so iF you FinD yoursElF in A strEssFul situAtion, try to lEt yoursElF [gigglE](咯咯地笑).A、psyChologist writEs: "{{u}} (46) {{/u}}.iF you stArt to lAugh, in timE you will ACtuAlly BEComE hAppiEr."