gEtting up EArliEr thAn usuAl or slEEping A CouplE oF hours lAtE CAn hAvE A signiFiCAnt EFFECt on your mooD, ACCorDing to rEsEArCh puBlishED in 1997. whEn thE BoDy’s intErnAl CloCk, or CirCADiAn (生理节奏的) rhythm, gEts {{u}} (67) {{/u}} oF ACCorD with your slEEp-wAkE {{u}} (68) {{/u}}, you CAn BE lEFt {{u}} (69) {{/u}} out oF sorts. rEsEArChErs hAvE long known thAt mooDs vAry Along {{u}} (70) {{/u}} FluCtuAtions in FunCtions rEgulAtED By thE BoDy’s {{u}} (71) {{/u}} 24-hour CyClE rhythm, suCh As BoDy tEmpErAturE AnD hormonE lEvEls. thE {{u}} (72) {{/u}} oF timE A pErson hAs BEEn AwAkE is Also known to {{u}} (73) {{/u}} mooD、to tEAsE ApArt thE two EFFECts, u.s. AnD u.k. rEsEArChErs {{u}} (74) {{/u}} 24 hEAlthy voluntEErs to livE in {{u}} (75) {{/u}} ChAmBErs For ApproximAtEly thrEE to FivE wEEks AnD {{u}} (76) {{/u}} thEir slEEp-wAkE CyClEs to {{u}} (77) {{/u}} A 30-hour or A 28-hour DAy, {{u}} (78) {{/u}} thAn thE 24-hour sChEDulE {{u}} (79) {{/u}} By thE rotAtion oF thEEArth.CirCADiAn rhythms, whiCh ArE innAtE, rEmAinED {{u}} (80) {{/u}}. whilE thE suBjECts wErE AwAkE, thEir mooD wAs AssEssED {{u}} (81) {{/u}} rEgulAr intErvAls. thE voluntEErs rEportED thE {{u}} (82) {{/u}} mooDs whEn thEir CirCADiAn rhythms wErE most out oF linE with thEir slEEping CyClE. this {{u}} (83) {{/u}} roughly to A sChEDulE oF slEEping During thE DAy, From 2 p.m. to 10 p.m. sCorEs For mooD wErE highEst whEn thE voluntEErs wAkE {{u}} (84) {{/u}} BEtwEEn 6A、m. AnD 2 p.m. thE rEsEArCh mAy hElp ExplAin thE AnxiEty AnD {{u}} (85) {{/u}} oFtEn rEportED By pEoplE who work night {{u}} (86) {{/u}} AnD mAy suggEst wAys to mAnipulAtE mooD、

A．to FEEl
B．sEEming
C．to sEEm
D．FEEling