胆总管探查术后所置的T形引流管拔除指征中，下列哪项不恰当
A．术后1周
B．血胆红素正常
C．病人无腹痛、腹胀等症状
D．病人体温正常
E．T管造影示肝内外胆管显影正常
参考答案：A
解析：[解题思路] 胆总管探查术后所置的T管引流，目的是减压、引流、支撑的作用。拔除前一定要在病人无感染、黄疸消退、无腹部症状、肝功能检验正常、T管造影显示肝内外胆管正常时方可拔除，通常在2周后，此时在T管周围已初步形成包裹，拔除时才比较安全，不致发生胆汁性腹膜炎等合并症。[命题规律] 考察“T形引流管拔除指征”。必须掌握。
| The blue of the sea is caused by the scattering of sunlight by tiny particles suspended in the water. Blue light, being of short wavelength, is scattered more efficiently than light of longer wavelengths. Although waters of the open ocean are commonly some shade of blue, green water is commonly seen near coasts, especially in tropical or subtropical regions. This is caused by yellow pigments being mixed with blue water. Phytoplankton are one source of the yellow pigment. Other microscopic plants may color the water brown or brownish-red. Near the shore, silt or sediment in suspension can give water a brownish hue. Outflow of large rivers can often be observed many miles offshore by the coloration of suspended soil particles. Marine phytoplankton (Greek for "plant wanderers") are microscopic single-celled plants that include diatoms, dinoflagellates, coccolithophorids, green algae, and blue-green algae, among others. The growth of these organisms, which photosynthesize light, depends on a delicate balance of nutrient enrichment via vertical mixing, which is often limited by the availability of nitrogen and light. Diatoms are one-celled plants with patterned glass coverings. Each glass, or silicon dioxide box, is ornamented with species-specific designs, pits, and perforations making them popular with microscopists and, more recently, electron scanning microscopists. |
Green water near coastlines is almost always caused by ______.
A．sand color
B．red pigments in coastal waters
C．blue pigment
D．reflected light and yellow pigment from plant life