这个图告诉我们,在1960年至1990年发展中国家在预期寿命和婴儿死亡率的变化。我们可以看到,在1960年的预期寿命约为40年,而在1990年,则上升至约60年。在此期间,婴儿死亡率下降至20off00到10off00。
这些变化有许多原因。首先,由于在科学和医学的进步,人们接受更好的医疗保健服务比以前。其次,随着经济的发展,人们开始了今天更好。
因此,他们可以很重视自己的饮食。第三,由于环境的保护提高认识,采取措施解决污染问题。所有这些都是有利于人们的健康,这当然是延长其寿命。
这个图告诉我们,在1960年至1990年发展中国家在预期寿命和婴儿死亡率的变化。我们可以看到,在1960年的预期寿命约为40年,而在1990年,则上升至约60年。在此期间,婴儿死亡率下降至20off00到10off00。
这些变化有许多原因。首先,由于在科学和医学的进步,人们接受更好的医疗保健服务比以前。其次,随着经济的发展,人们开始了今天更好。
因此,他们可以很重视自己的饮食。第三,由于环境的保护提高认识,采取措施解决污染问题。所有这些都是有利于人们的健康,这当然是延长其寿命。
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