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\u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi ch\u01b0a t\u1eebng ho\u1eb7c \u00edt tham gia th\u00ec kh\u00e1i ni\u1ec7m c\u1ea7u l\u00f4 v\u00e0 kh\u1ea3 n\u0103ng ph\u00e2n bi\u1ec7t v\u1edbi c\u00e1c lo\u1ea1i kh\u00e1c kh\u00f4ng ph\u1ea3i d\u1ec5 d\u00e0ng. C\u1ea7u l\u00f4 l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa hai con s\u1ed1 \u1edf hai v\u1ecb tr\u00ed b\u1ea5t k\u00ec trong b\u1ea3ng k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1.<\/p>\n
C\u1ea7u l\u00f4 \u0111\u1eb9p l\u00e0 c\u1ea7u l\u00f4 ch\u1ea1y \u1ed5n \u0111\u1ecbnh trong m\u1ed9t kho\u1ea3ng th\u1eddi gian g\u1ea7n \u0111\u00e2y nh\u1ea5t m\u00e0 ng\u01b0\u1eddi ch\u01a1i theo d\u00f5i. Kho\u1ea3ng gi\u1edbi h\u1ea1n ph\u1ea1m vi theo d\u00f5i th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia ra c\u00e1c giai \u0111o\u1ea1n: 1 tu\u1ea7n, 30 ng\u00e0y, 60 ng\u00e0y, 100 ng\u00e0y ho\u1eb7c 1 n\u0103m.<\/p>\n
T\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 hi\u1ec3u c\u1ea7u l\u00f4 ch\u1ea1y \u1ed5n \u0111\u1ecbnh nh\u1ea5t ngh\u0129a l\u00e0 t\u1ef7 l\u1ec7 thay \u0111\u1ed5i c\u1ee7a c\u1ea7u l\u00f4 \u0111\u00f3 r\u1ea5t th\u1ea5p, g\u1ea7n nh\u01b0 l\u00e0 kh\u00f4ng bi\u1ebfn \u0111\u1ed5i v\u00e0 m\u1ed9t c\u1ea7u l\u00f4 \u1ed5n \u0111\u1ecbnh duy tr\u00ec tr\u1ea1ng th\u00e1i nh\u01b0 v\u1eady trong kho\u1ea3ng th\u1eddi gian g\u1ea7n nh\u1ea5t v\u1edbi khung \u0111\u00e1nh l\u00f4 c\u1ee7a ng\u01b0\u1eddi ch\u01a1i.<\/p>\n
T\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 th\u1ea5y ch\u1ec9 trong kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh m\u00e0 t\u1ea7n su\u1ea5t c\u1ea7u l\u00f4 \u0111\u00f3 th\u01b0\u1eddng xuy\u00ean n\u1ed5, s\u1ed1 ra li\u00ean t\u1ee5c ho\u1eb7c c\u00f3 th\u1ec3 th\u1eddi gian n\u1ed5 c\u00e1ch nhau 3 \u0111\u1ebfn 4 ng\u00e0y ( c\u1ea7u l\u00f4 n\u00e0y gi\u1edbi h\u1ea1n trong 20 \u0111\u1ebfn 45 ng\u00e0y ).<\/p>\n
Vi\u1ec7c c\u1ea7u l\u00f4 \u1ed5n \u0111\u1ecbnh kh\u00f4ng h\u1ec1 \u0111\u01a1n gi\u1ea3n, ng\u01b0\u1eddi ch\u01a1i c\u1ea7n ph\u1ea3i chu\u1ea9n b\u1ecb k\u1ef9 c\u00e0ng nh\u1eefng c\u00f4ng vi\u1ec7c d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 n\u1eafm ch\u1eafc \u0111\u01b0\u1ee3c ph\u1ea7n th\u1eafng.<\/p>\n
M\u1ee5c l\u1ee5c<\/p>\n<\/div>\n