首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   12460篇
  免费   864篇
  国内免费   22篇
耳鼻咽喉   87篇
儿科学   402篇
妇产科学   366篇
基础医学   1525篇
口腔科学   139篇
临床医学   2211篇
内科学   1959篇
皮肤病学   164篇
神经病学   1206篇
特种医学   268篇
外科学   1185篇
综合类   221篇
一般理论   24篇
预防医学   1501篇
眼科学   288篇
药学   818篇
  2篇
中国医学   7篇
肿瘤学   973篇
  2023年   56篇
  2022年   128篇
  2021年   213篇
  2020年   138篇
  2019年   224篇
  2018年   256篇
  2017年   205篇
  2016年   201篇
  2015年   232篇
  2014年   316篇
  2013年   574篇
  2012年   770篇
  2011年   886篇
  2010年   467篇
  2009年   451篇
  2008年   804篇
  2007年   809篇
  2006年   876篇
  2005年   852篇
  2004年   903篇
  2003年   844篇
  2002年   754篇
  2001年   166篇
  2000年   109篇
  1999年   136篇
  1998年   154篇
  1997年   130篇
  1996年   97篇
  1995年   104篇
  1994年   75篇
  1993年   78篇
  1992年   102篇
  1991年   70篇
  1990年   76篇
  1989年   66篇
  1988年   61篇
  1987年   62篇
  1986年   79篇
  1985年   62篇
  1984年   65篇
  1983年   67篇
  1982年   55篇
  1981年   63篇
  1980年   69篇
  1979年   40篇
  1978年   44篇
  1977年   36篇
  1976年   30篇
  1975年   32篇
  1973年   35篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
The Covid-19 pandemic lockdown regulations caused retirement homes to temporarily ban in-person visitation potentially increasing the mental health risks of older people. An opportunity arose for a multistakeholder community collaboration to design a mental health program for older people. To evaluate the process of delivering a 12-week psychosocial program aimed at preventing loneliness, countering boredom, and providing older people in restricted settings with education about Covid-19 during the lockdown, in Durban, South Africa. A qualitative retrospective design was used. Data from two focus groups and six semistructured individual interviews conducted with stakeholders (volunteers, social workers, and residents) postproject were analyzed using reflexive thematic analysis. Stakeholders had varied experiences of the project, in terms of content, processes of engagement, and implementation, resulting in five themes. The study concluded with recommendations. A strong need exists for multistakeholder community collaborations when implementing a program where the context restricts physical access.  相似文献   
92.
93.
In this study a staff planning model for a health service clinic has been developed and validated using an example case of a health service clinic. The primary purpose of this research is to develop a representative staff planning model which balances the cost and benefits of staff task flexibility through crosstraining for a healthcare facility. Additionally, legal requirements for task substitution in the healthcare industry have been considered in the model.  相似文献   
94.
Using prospective data gathered from a sample of 323 college women over a 10-week academic quarter, the present study examined whether dissociation and posttraumatic symptomatology mediate or moderate sexual revictimization. Results indicated that posttraumatic symptomatology, but not dissociation, moderated the link between previous and subsequent sexual victimization. Neither posttraumatic symptomatology nor dissociation mediated revictimization.  相似文献   
95.

Purpose

We evaluated risk factors for the development of bladder tumors in spinal cord injury patients.

Materials and Methods

A retrospective review was done of all bladder tumors at 1 institution with matched controls for 7 years.

Results

We identified 17 malignant and 2 benign tumors. Indwelling bladder catheters and a history of bladder stones were statistically significant risk factors. Four patients with negative biopsies underwent repeat biopsy due to suspicious cytology and cancer was found.

Conclusions

An indwelling urinary catheter and a history of bladder stones are statistically significant risk factors. Cytology and biopsy are complementary in the evaluation of urothelial malignancy in this population. A high index of suspicion and thorough evaluation are needed in spinal cord injury patients.  相似文献   
96.

Purpose

To compare two doses of bolus epidural morphine with bolus iv morphine for postoperative pain after abdominal or genitourinary surgery in infants.

Methods

Eighteen infants were randomly assigned to bolus epidural morphine (0.025 mg · kg?1 or 0.050 mg · kg?1) or bolus iv morphine (0.050–0.150 mg · kg?1). Postoperative pain was assessed and analgesia provided, using a modified infant pain scale. Monitoring included continuous ECG, pulse oximetry, impedance and nasal thermistor pneumography. The CO2 response curves and serum morphine concentrations were measured postoperatively.

Results

Postoperative analgesia was provided within five minutes by all treatment methods. Epidural groups required fewer morphine doses (3.8 ± 0.8 for low dose [LE], 3.5 ± 0.8 for high dose epidural [HE] vs. 6.7 ± 1.6 for iv, P < 0.05) and less total morphine (0.11 ± 0.04 mg · kg?1 for LE, 0.16 ± 0.04 for HE vs 0.67 ± 0.34 for iv, P < 0.05) on POD1 Dose changes were necessary in all groups for satisfactory pain scores. Pruritus, apnoea, and haemoglobin desaturation occurred in all groups. CO2 response curve slopes, similar preoperatively (range 36–41 ml · min?1 · mmHg ETco 2 ?1 · kg?1) were generally depressed (range, 16–27 ml · min?1 · mmHg ETco 2 ?1 · kg?1) on POD1. Serum morphine concentrations, negligible in LE (<2 ng · ml?1), were similar in the HE and iv groups (peak 8.5 ± 12.5 and 8.6 ± 2.4 ng · ml?1, respectively).

Conclusion

Epidural and iv morphine provide infants effective postoperative analgesia, although side effects are common. Epidural morphine gives satisfactory analgesia with fewer doses (less total morphine); epidural morphine 0.025 mg · kg?1 is appropriate initially. Infants receiving epidural or iv morphine analgesia postoperatively need close observation in hospital with continuous pulse oximetry.  相似文献   
97.
98.
W. Edwards Deming is considered a guru of quality by many international manufacturers. His ideas revolutionized Japan's auto industry in the 1950s, but did not make a substantial impact in the United States until 1980. Increasingly, service organizations, from hotels to public utility companies, are experimenting with his principles. This article explains how a 165-bed community hospital--Brazosport Memorial Hospital in Lake Jackson, Texas--is putting Deming's ideas to work in health care. Deming's philosophy and principles are described as is the hospital's application and implementation of his ideas; preliminary results are encouraging.  相似文献   
99.
100.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号