<\/span><\/h2>\nR\u0103ng kh\u00f4n ch\u00ednh l\u00e0 chi\u1ebfc r\u0103ng m\u1ecdc sau c\u00f9ng khi x\u01b0\u01a1ng h\u00e0m c\u1ee7a ch\u00fang ta \u0111\u00e3 ph\u00e1t tri\u1ec3n \u1ed5n \u0111\u1ecbnh v\u00e0 ch\u1eafc ch\u1eafn. V\u00e0o th\u1eddi \u0111i\u1ec3m r\u0103ng kh\u00f4n m\u1ecdc, nh\u1eefng chi\u1ebfc r\u0103ng m\u1ecdc tr\u01b0\u1edbc \u0111\u00f3 g\u1ea7n nh\u01b0 \u0111\u00e3 chi\u1ebfm \u0111\u00f3ng h\u1ebft ch\u1ed7 tr\u1ed1ng tr\u00ean cung h\u00e0m, khi\u1ebfn r\u0103ng kh\u00f4n m\u1ecdc l\u00ean g\u1eb7p nhi\u1ec1u tr\u1edf ng\u1ea1i, d\u1ec5 d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng m\u1ecdc ng\u1ea7m, m\u1ecdc l\u1ec7ch v\u00e0 g\u00e2y ra nhi\u1ec1u tri\u1ec7u ch\u1ee9ng kh\u00f3 l\u01b0\u1eddng.<\/p>\n