[单选题] 儿童长期缺锌可致以下疾病,不包括
A.性发育迟缓
B.创伤愈合不良
C.多发性神经炎
D.生长发育障碍
E.垂体调节机能障碍

2012年6月3日，广州3岁女童琪琪肚子卡在4楼防盗网，湖北打工青年周冲立即徒手爬窗将挺举，经众街坊全力帮助，女童安全获救，众亲切的将周冲称为“托举哥。
周冲英勇救人的事迹传遍了广州，感动了全国，共青团广东省委授予他“广东青年五四奖章“。继周冲之后，类似“托举哥”的事迹在宁波等地不断涌现，从“托举哥”周冲，到时“夺刀侠”黄兆景，到时“最美司机”吴志宏，再到美教师张丽莉……在感动我们的同时，理激起社会公众的善良情怀，推动了社会走向温暖和美好。

Modem mass-production methods lower the cost of making goods, and thus give us better values. At the same time, American ingenuity and science are constantly at work improving the quality of products. In this way, better quality products at good values are continually being brought to the people of all income groups.
As an example of how this works ,when facial tissues were first put on the market in 1924 ,they were made in limited quantities and sold at 65 cents per box of 200. People liked these facial tissues immediately and began asking for them when they went into different stores. Because there was such a demand for the product, manufacturers began making tissues in larger and larger quantities. Because the manufacturers were making tissues in greater quantities, their production costs were lowered, so that the cost of tissues went down.In the meanwhile, the quality of facial tissues was constantly improving, because more manufacturers went into the business of m
A. fewer customers buy them
B. more and more of them are produced
C. their quality becomes poorer
D. more manufacturers produce them.