怎样选择床垫？
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 180%;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";"> 选购床垫时先看看电脑线缝的针脚，软床垫的面料绗缝松紧应一致，无明显皱褶、浮线。现行标准规定单针跳线不允许超过</span><span lang="EN-US"><font face="Times New Roman">8</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">处，不允许有断线，不允许跳双针，缝边、四角圆弧应匀称，不允许露毛边，否则说明床垫的质量不够好，会影响床垫的使用寿命。</span><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman"> </font></span></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 180%;"><span lang="EN-US"><font face="Times New Roman"> </font></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 180%;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">不要为面料图案所左右，要注意面料本身。目前市面上出售的床垫面料多为织绵布和化纤布。一些进口织绵布除更结实、卫生外，表面还经抗菌处理，更符合健康睡眠的要求。</span><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman"> </font></span></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 180%;"><span lang="EN-US"><font face="Times New Roman"> </font></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 180%;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";"> 床垫有</span><span lang="EN-US"><font face="Times New Roman">3</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">种基本类型：泡沫式、填充式和弹簧式。高质量的泡沫式床垫应当至少有</span><span lang="EN-US"><font face="Times New Roman">11</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">厘米厚，如果厚度不够，不宜购买。填充式床垫的承受能力取决于它的弹性和填充物的质量，再加上是否有一个弹性底座支撑。弹簧床垫的质量取决于它的弹簧数量，越多越好。弹簧床垫的弹簧数量一般</span><span lang="EN-US"><font face="Times New Roman">500</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">个左右，最少不能低于</span><span lang="EN-US"><font face="Times New Roman">288</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">个，有些床垫的弹簧能多达</span><span lang="EN-US"><font face="Times New Roman">1000</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">个，越多越好。</span><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman"> </font></span></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 180%;"><span lang="EN-US"><font face="Times New Roman"> </font></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 180%;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";"> 太软的床垫，睡起来虽然舒服但容易陷落，导致翻身困难；而太硬的床垫则不能适当地承托身体各部位，对脊椎形成更严重的慢性伤害。最好做以下测试：</span><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman"> </font></span></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 180%;"><span lang="EN-US"><font face="Times New Roman"> </font></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 180%;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";"> </span><span lang="EN-US"><font face="Times New Roman">A.</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">平躺上去，手向颈部、腰部和臀下到大腿之间这</span><span lang="EN-US"><font face="Times New Roman">3</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">处明显弯曲的地方往里伸，看有没有空隙；再向一侧翻个身，用同样的方法试一试身体曲线突出部位和床垫之间有没有空隙；如果都没有，就证明这个床垫和人在睡眠时颈、背、腰、臀、腿的自然曲线贴切吻合，这样的床垫就可说是软硬适度的。</span><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman"> </font></span></span></p><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; mso-font-kerning: 1.0pt; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"> </span>
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