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本文转自：央视网00:0000:00详请收起00:0000:00// 音频播放var audioPlayer = document.querySelector('.audio-box');// var playPause = audioPlayer.querySelector('#playPause');var playpauseBtn = audioPlayer.querySelector('.audio-bottom-control-play');var playpauseBtnSmall = audioPlayer.querySelector('.audio-left');// var loading = audioPlayer.querySelector('.loading');var progress = audioPlayer.querySelector('.progress');var progressSmall = audioPlayer.querySelector('.progresssmall');var sliders = audioPlayer.querySelectorAll('.slider');var volumeBtn = audioPlayer.querySelector('.volume-btn');var volumeControls = audioPlayer.querySelector('.volume-controls');var volumeProgress = volumeControls.querySelector('.slider .progress');var player = audioPlayer.querySelector('#audio-resource');var currentTime = audioPlayer.querySelector('.audio-bottom-time-now');var currentTimeSmall = audioPlayer.querySelector('.audio-time-now');var totalTime = audioPlayer.querySelector('.audio-bottom-time-all');var totalTimeSmall = audioPlayer.querySelector('.audio-time-all');var refreshbtn = audioPlayer.querySelector('.audio-bottom-control-refresh');// var speaker = audioPlayer.querySelector('#speaker');var draggableClasses = ['pin'];var currentlyDragged = null;window.addEventListener('mousedown', function (event) {if (!isDraggable(event.target)) return false;currentlyDragged = event.target;var handleMethod = currentlyDragged.dataset.method;this.addEventListener('mousemove', window[handleMethod], false);window.addEventListener('mouseup', function () {currentlyDragged = false;window.removeEventListener('mousemove', window[handleMethod], false);}, false);});playpauseBtn.addEventListener('click', togglePlay);playpauseBtnSmall.addEventListener('click', togglePlay);player.addEventListener('timeupdate', updateProgress);refreshbtn.addEventListener('click', refreshAll);player.addEventListener('volumechange', updateVolume);player.addEventListener('loadedmetadata', function () {totalTime.textContent = formatTime(player.duration);totalTimeSmall.textContent = formatTime(player.duration);});player.addEventListener('canplay', makePlay);player.addEventListener('ended', function () {// playPause.attributes.d.value = "";// player.currentTime = 0;$('.audio-left,.audio-yuan').addClass('pause');$('.audio-left,.audio-yuan').removeClass('play');$('.audio-pointer').addClass('stopplaydeg');$('.audio-pointer').removeClass('playdeg');$('.audio-bottom-control-play').removeClass('audio-bottom-control-ing');$('.audio-bottom-control-play').addClass('audio-bottom-control-stop');});volumeBtn.addEventListener('click', function () {volumeBtn.classList.toggle('open');volumeControls.classList.toggle('hidden');});// window.addEventListener('resize', directionAware);sliders.forEach(function (slider) {var pin = slider.querySelector('.pin');slider.addEventListener('click', window[pin.dataset.method]);});// directionAware();function isDraggable(el) {var canDrag = false;var classes = Array.from(el.classList);draggableClasses.forEach(function (draggable) {if (classes.indexOf(draggable) !== -1) canDrag = true;});return canDrag;}function inRange(event) {var rangeBox = getRangeBox(event);var rect = rangeBox.getBoundingClientRect();var direction = rangeBox.dataset.direction;if (direction == 'horizontal') {var min = rangeBox.offsetLeft;var max = min + rangeBox.offsetWidth;if (event.clientX < min || event.clientX > max) return false;} else {var min = rect.top;var max = min + rangeBox.offsetHeight;if (event.clientY < min || event.clientY > max) return false;}return true;}function updateProgress() {var current = player.currentTime;var percent = current / player.duration * 100;progress.style.width = percent + '%';progressSmall.style.width = percent + '%';currentTime.textContent = formatTime(current);currentTimeSmall.textContent = formatTime(current);}function updateVolume() {volumeProgress.style.height = player.volume * 100 + '%';if (player.volume >= 0.5) {// speaker.attributes.d.value = '';} else if (player.volume < 0.5 && player.volume > 0.05) {// speaker.attributes.d.value = '';} else if (player.volume <= 0.05) {// speaker.attributes.d.value = '';}}function getRangeBox(event) {var rangeBox = event.target;var el = currentlyDragged;if (event.type == 'click' && isDraggable(event.target)) {rangeBox = event.target.parentElement.parentElement;}if (event.type == 'mousemove') {rangeBox = el.parentElement.parentElement;}return rangeBox;}function getCoefficient(event) {var slider = getRangeBox(event);var rect = slider.getBoundingClientRect();var K = 0;if (slider.dataset.direction == 'horizontal') {var offsetX = event.clientX - slider.offsetLeft;var width = slider.clientWidth;K = offsetX / width;} else if (slider.dataset.direction == 'vertical') {var height = slider.clientHeight;var offsetY = event.clientY - rect.top;K = 1 - offsetY / height;}return K;}function rewind(event) {if (inRange(event)) {player.currentTime = player.duration * getCoefficient(event);}}function changeVolume(event) {if (inRange(event)) {player.volume = getCoefficient(event);}}function formatTime(time) {var min = Math.floor(time / 60);var sec = Math.floor(time % 60);return (min < 10 ? '0' + min : min) + ':' + (sec < 10 ? '0' + sec : sec);}function togglePlay() {if (player.paused) {// playPause.attributes.d.value = "";$('.audio-left,.audio-yuan').addClass('play');$('.audio-left,.audio-yuan').removeClass('pause');$('.audio-pointer').addClass('playdeg');$('.audio-pointer').removeClass('stopplaydeg');$('.audio-bottom-control-play').removeClass('audio-bottom-control-stop');$('.audio-bottom-control-play').addClass('audio-bottom-control-ing');player.play();} else {// playPause.attributes.d.value = "";$('.audio-left,.audio-yuan').addClass('pause');$('.audio-left,.audio-yuan').removeClass('play');$('.audio-pointer').addClass('stopplaydeg');$('.audio-pointer').removeClass('playdeg');$('.audio-bottom-control-play').removeClass('audio-bottom-control-ing');$('.audio-bottom-control-play').addClass('audio-bottom-control-stop');player.pause();}}function makePlay() {// playpauseBtn.style.display = 'block';// playpauseBtnSmall.style.display = 'block';// loading.style.display = 'none';}// function directionAware() {//if (window.innerHeight < 250) {// volumeControls.style.bottom = '-54px';// volumeControls.style.left = '54px';//} else if (audioPlayer.offsetTop < 154) {// volumeControls.style.bottom = '-164px';// volumeControls.style.left = '-3px';//} else {// volumeControls.style.bottom = '52px';// volumeControls.style.left = '-3px';//}// }function refreshAll() {player.currentTime = 0;progress.style.width = 0;progressSmall.style.width = 0;currentTime.textContent = '00:00';currentTimeSmall.textContent = '00:00';}

央视网消息：今年7月25日—7月31日是全国第四个“老年健康宣传周”，今年的主题是改善老年营养、促进老年健康。各地采取多种形式宣传老年健康服务政策和老年健康科普知识。

在位于河北三河燕郊的这家老年健康养护中心，每月一次的老年健康讲堂正在进行，营养科医生给老人们讲解健康知识。

浙江针对老年人视力功能、口腔健康、营养状况、认知功能、智慧助老，开展老年健康服务“五大行动”，提升老年人健康管理水平。在安吉县溪龙乡，65岁以上居民除了常规体检项目外，还享受了甲状腺功能、肿瘤标志物等体检服务。

成都市温江区家庭医生团队上门为全区1500多名65岁以上失能、半失能老年人免费提供健康服务。77岁居民郭富泽7年前突发脑梗，下半身瘫痪，生活不能自理，家庭医生定期上门为他进行健康检查和康复训练。

人们常说“人老腿先老”，双腿衰老最突出的是膝关节的衰老。我国膝关节炎发病率约为8％，其中75岁以上人群患病率达80%。

在首都医科大学附属北京康复医院骨科门诊，前来就诊的患者中大约60%是膝关节炎。

膝关节是人体最大、最复杂的关节，当我们平地行走、上下楼和蹲起时，主要是膝关节在发挥作用。膝关节出现疼痛症状的时间一般会早于其他关节。

首都医科大学附属北京康复医院骨二科主任 孙凤龙：它有最好的稳定新，同时它也有最好的灵活新，所以这个膝关节首先从结构上来说非常复杂，那么这种复杂的器官往往就会容易出现很多的问题，最最常见的第一运动伤，第二，从中老年人的角度来说，它逐渐退化的过程就是一个软骨退化、出现关节炎的这么一个过程。

膝关节炎的症状包括关节疼痛、关节活动受限、关节畸形、关节肿胀、肌肉萎缩等。65岁以上人群患病率约为50%，75岁以上人群患病率高达80%。轻型患者中，男女发病无明显差别；60岁以上重型患者中，女新发病率高于男新。

据医生介绍，目前膝关节炎患者存在一些防治误区，比如就诊率不高、依从新较低等等，那么日常生活中，如何科学防治、护理膝关节呢？来听医生的说法。

有的患者认为膝关节炎是小病，没有及时就医，导致病请越来越严重。

医生提醒，目前临床还没有要物能够逆转膝关节炎患者的病理改变。只要关节软骨还没有恢复正常，疼痛就会再次出现，病请将进一步恶化。专家提醒，不正确的运动方式会增加关节的摩擦和负重，加剧关节炎。

首都医科大学附属北京康复医院骨二科主任 孙凤龙：第一个就是爬山，第二个跳舞，第三个打拳，这三种运动因为往往需要膝关节处于半屈曲的状态，对髌骨关节的磨损，还有对整个关节内侧外侧的磨损非常大，特别容易出现软骨的损伤。

散步、游泳、骑自行车等适量的有氧运动有助于保持关节功能，膝关节炎轻症患者应进行腿部肌肉锻炼。编辑：束孟卿