<img src="http://lady.csonline.com.cn/12/200711/W020071116369357110242.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {}" onmousewheel="return imgzoom(this);" alt="" /> 在医学上,骨质疏松是指骨组织显微结构受损,骨矿成分和骨基质等比例的不断减少,骨质变薄,骨小梁数量减少,骨脆性增加和骨折危险度升高的一种全身骨代谢障碍的疾病。这种疾病早已经不是老年人的专利了,它一步步向年轻人进攻,成为白领们谨防的流行病。